"Standard Deviation" Essays and Research Papers

I'll be honest. Standard deviation is a more difficult concept than the others we've covered. And unless you are writing for a specialized, professional audience, you'll probably never use the words "standard deviation" in a story. But that doesn't mean you should ignore this concept. The standard deviation is kind of the "mean of the mean," and often can help you find the story behind the data. To understand this concept, it can help to learn about what statisticians call normal distribution...

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Standard Deviation objective • Describe standard deviation and it’s importance in biostatistics. Measure of Dispersion • Indicates how widely the scores are dispersed around the central point (or mean.) -Standard deviation Standard Deviation. • The most commonly used method of dispersion in oral hygiene. • The larger the standard deviation, the wider the distribution curve. Standard Deviation • SD,  ,  (sigma) • Indicates how subjects differ from the average of the group/ the more they...

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Deviation Definition: Behavior commonly seen in children that is the result of some obstacle to normal development such behavior may be commonly understand as negative (a timid child, a destructive child) or positive (a quite child), both positive and negative deviation will disappear once the child begins to concentrate on a piece of work freely chosen by him. The physical deforms are easier to identify. This can be by birth due to an accident etc… and most such physical deforms...

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Mean and Standard Deviation The mean, indicated by μ (a lower case Greek mu), is the statistician's jargon for the average value of a signal. It is found just as you would expect: add all of the samples together, and divide by N. It looks like this in mathematical form: In words, sum the values in the signal, xi, by letting the index, i, run from 0 to N-1. Then finish the calculation by dividing the sum by N. This is identical to the equation: μ =(x0 + x1 + x2 + ... + xN-1)/N. If you are not...

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selected. c) reasonably large due to the “cluster” effect. d) 100 divided by the size of the population of Laramie. Costs for standard veterinary services at a local animal hospital follow a Normal distribution with a mean of $80 and a standard deviation of $20. Answer the next three questions. 8. Give the sample space for the costs of standard veterinary services. a) {X ≥ 0} b) { 0 ≤ X ≤ 80} c) {0 ≤ X ≤ 160} d) None of these. 9. What is the probability that one...

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milligrams of tar per cigarette and a standard deviation equal to 1.0 milligram. Suppose a sample of 100 low-tar cigarettes is randomly selected from a day’s production and the tar content is measured in each. Assuming that the tobacco company’s claim is true, what is the probability that the mean tar content of the sample is greater than 4.15 milligrams? [0.00621] 2. The safety limit of a crane is known to be 32 tons. The mean weight and the standard deviation of a large number of iron rods...

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the mean from part b find the standard deviation of the probability distribution. 8. A computer password consists of two letters followed by a five-digit number, none of which can be repeated. After 3 tries the computer locks down and notifies security. a) What is the probability of guessing the correct password on the first try? b) What it the probability of guessing the correct password within three tries? 9. Find the mean and standard deviation of the binomial distribution...

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the actuarial field and finds the average salary to be $41,000. The population standard deviation is $3000. Can her claim be supported at 0.05? x¯=14.7, μx¯=13.77, ox¯=5.34, n=29, α=.01 3. Monthly Home Rent. The average monthly rent for a one bedroom in San Francisco is $ 1229. A random sample of 15 one bedroom homes about 15 miles outside of San Francisco had a mean rent of $1350. The population standard deviation is $250. At a=0.05 can we conclude that the monthly rent outside San Francisco...

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9551/SQRT(300),1) = 0.0783 (c) A circuit contains three resistors wired in series. Each is rated at 6 ohms. Suppose, however, that the true resistance of each one is a normally distributed random variable with a mean of 6 ohms and a standard deviation of 0.3 ohm. What is the probability that the combined resistance will exceed 19 ohms? How "precise" would the manufacturing process have to be to make the probability less than 0.005 that the combined resistance of the circuit would exceed 19...

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Sales Price |   | Days to Sell |   |   |   |   |   |   |   | Mean | 474007.5 | Mean | 454222.5 | Mean | 106 | Standard Error | 31194.293 | Standard Error | 30439.72954 | Standard Error | 8.256078 | Median | 437000 | Median | 417500 | Median | 96 | Mode | 975000 | Mode | 305000 | Mode | 85 | Standard Deviation | 197290.03 | Standard Deviation | 192517.7534 | Standard Deviation | 52.21602 | Sample Variance | 3.892E+10 | Sample Variance | 37063085378 | Sample Variance | 2726.513 | Kurtosis...

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in analysing the data is determining if outliers exists within the data. The presence of outliers must be evaluated because their existence could distort the data and make it inaccurate. In order to determine if outliers exist the average and standard deviation must be calculated in order to calculate the Z score, which will show, wither or not outliers exist. In this instance to outliers where found present in the data set as all of the data fell within the +3,-3 range, the largest positive outlier...

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corresponds to a 94% level of confidence. A. 1.88 B. 1.66 C. 1.96 D. 2.33 2. In a sample of 10 randomly selected women, it was found that their mean height was 63.4 inches. Form previous studies, it is assumed that the standard deviation, σ, is 2.4. Construct the 95% confidence interval for the population mean. A. (61.9, 64.9) B. (58.1, 67.3) C. (59.7, 66.5) D. (60.8, 65.4) 3. Suppose a 95% confidence interval for µ turns out to be (120, 310). To make...

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Standard Deviation Abstract QRB/501 Standard Deviation Abstract Standard Deviations Are Not Perverse Purpose: The purpose of this article is to illustrate how using statistical data, such as standard deviation, can help a cattleman choose the best lot of calf’s at auction. The statistical data used in these decision making processes can also help the cattleman with future analysis of the lots purchased and existing stock. Research Question: How can understanding the standard deviation...

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14, 14, 15, 15, 16. The mean is 14.0mm.What is the best estimate of the standard deviation? 
 -1mm 5  1000 bananas were collected from a single plantation and weighed.Their masses formed a normal distribution. How many bananas would be expected to be within 2 standard deviations of the mean? 
 -950 6  In a normal distribution, what percentage of values fall within ±1 standard deviation of the mean and
±2 standard deviations of the mean? 
 -1= 68% -2=95% 7  The lengths of the leaves of dandelion plants...

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Standard deviation can be difficult to interpret as a single number on its own. Basically, a small standard deviation means that the values in a statistical data set are close to the mean of the data set, on average, and a large standard deviation means that the values in the data set are farther away from the mean, on average. The standard deviation measures how concentrated the data are around the mean; the more concentrated, the smaller the standard deviation. A small standard deviation can...

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and variability (standard deviation) of Reynolds, Hasbro, and Vanguard Index 500 Trust during the past 5 years. Which one appears to be riskiest? 　 S&P 500 REYNOLDS HASBRO Mean 0.57% 1.87% 1.18% Variance 0.13% 0.88% 0.66% Standard Deviation 3.60% 9.37% 8.12% - Conclusion: Reynolds appears to be riskiest. - Explanation: Given the fact that risk reflects the uncertainty of future return on a given asset or a portfolio of assets, standard deviation is thus used as...

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and standard deviation of the probability distribution created by rolling a die. Either show work or explain how your answer was calculated. Descriptive Statistics: Die1 Variable Mean StDevDie1 3.450 1.317Mean: 3.50 Standard deviation: 1.317Calculations were derived by using the minitab and going into the Stat > Basic Statistics > Display Descriptive Statistics > Variables than select the C14 (Die1) > below enter the statistics and check mark only mean and standard deviation...

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For the standard normal probability distribution, the area to the left of the mean is a. –0.5 c. any value between 0 to 1 b. 0.5 d. 1 Answer: B The total area under the curve is 1. The area on the left is the half of 1 which is 0.5. ____ 2. Which of the following is not a characteristic of the normal probability distribution? a. The mean and median are equal b. The mean of the distribution can be negative, zero, or positive c. The distribution is symmetrical d. The standard deviation...

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$3,291.00 up to $15,906.00 for the period of the said year. Its average price is $6,165.26 with a standard deviation of $2,949.50. It can be seen that prices are not close by to one another. With regards to mileage, the majority of the automobiles runs 41 miles for every gallon of gasoline, while the least runs only for 12 miles. The mean of mileage has resulted to 21.30 mpg, with a standard deviation of 5.79 mpg. As to the variable repair record it can be seen that only 69 were observed out of the...

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many normal distributions. Normal distributions can differ in their means and in their standard deviations. Figure 1 shows three normal distributions. The green (left-most) distribution has a mean of -3 and a standard deviation of 0.5, the distribution in red (the middle distribution) has a mean of 0 and a standard deviation of 1, and the distribution in black (right-most) has a mean of 2 and a standard deviation of 3. These as well as all other normal distributions are symmetric with relatively more...

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Tensile testing of thermoplastics Standards: AS 1145 (Australian standard), ASTM D 638 (US standard) Testing equipment: Universal testing machine Zwick Z010; Electronic digital calliper Pro-max. Method: Measure and record the dimensions of the cross sections of the test specimen; Clamp up specimen in the crossheads of machine and run the test. Set distance between grips 100 mm Perform five tensile tests. Determine the mean and standard deviation of the samples tensile strength...

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| 1.0056 | 32 | 1.0058 | 33 | 1.0061 | The standard deviation value represents the average distance of a set of scores from the mean. It statistical measure of the precision for a series of repetitive measurements. The sample standard deviation,s, is the positive square root of the sample variance. RESULT a) DATA: b) (i)10 ml...

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following returns and corresponding probabilities for asset A, compute its standard deviation and coefficient of variation. Answer: SD = 3.87% CV = SD/K = 3.87/15 = 0.26 Champion Breweries must choose between two asset purchases. The annual rate of return and related probabilities given below summarize the firm's analysis. 5. For each asset, compute (a) the expected rate of return. (b) the standard deviation of the expected return. (c) the coefficient of variation of the return. ...

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confidence intervals verses point estimates? The sample mean is a point estimate (single number estimate) of the population mean – Due to sampling error, we know this is off. Instead, we construct an interval estimate, which takes into account the standard deviation, and sample size. – Usually stated as (point estimate) ± (margin of error) • What is meant by a 95% confidence interval? That we are 95% confident that our calculated confidence interval actually contains the true mean. • What is the...

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Mean, median, mode and standard deviation of Allium cepa cells and Ovibos moschatus Oculi cells | Allium cepa cells | Ovibos moschatus Oculi cells | Mean / m | 296.0 | 29.0 | Median / m | 300.0 | 30.0 | Mode / m | 320.0 | 30.0 | Standard deviation | 66.7 | 7.1 | Formula used for calculating standard deviation Allium cepa cells: =√ (61220/14) =66.7(1d.p.) Ovibos moschatus Oculi cells: =√ (710/14) =7.1(1d.p.) Formula used for calculating standard deviation Allium cepa cells: =√...

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+ (0.20) (0.15) + (0.40)(0.20) + (0.20) (0.25) + (0.10) (0.30) = 0.20 or 20% 5. The risk of a single asset is measured by its standard deviation or coefficient of variation. The standard deviation measures the variability of outcomes around the expected value and is an absolute measure of risk. The coefficient of variation is the ratio of the standard deviation to the expected value and is a relative measure of risk. FORMULA OF SD and COEFFICIENT VARIATION: Let’s look at problem No. 3 Problem...

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measurements. Section 7.1 Turning Data into Information Four kinds of useful information about a set of data: center, variability, shape and outlier Types of center: mean, median and mode (and their definitions) Types of variability: range, standard deviation and IQR (and their definitions) Types of shape: symmetric, skew to the left, skew to the right, unimodal and bimodal (and their definitions) Definition of outlier (unusual values): Section 7.2 Picturing Data Stem-and-leaf plot and how to...

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the products they liked. This effect was only due to the customer's mood during the time of purchase. In an attempt to understand the impact of brand loyalty on consumers, Bhattacharya (1997) investigated the factors that relate to the deviations of brand loyalty in markets. He looked at measures of brand loyalty against category requirements used by consumers (i.e.: norms of a product and the appropriate location in the store). The study finds that on average, brands that cater to some...

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[ασ (RA ) − (1 − α)σ (RB )]2 . Therefore, the standard deviation of portfolio P is σ (RP ) = ασ (RA ) − (1 − α)σ (RB ). As assets A and B are perfectly negatively correlated, we can construct portfolio P such that its standard deviation is 0. The weights of such portfolio are 0 = ασ (RA ) − (1 − α)σ (RB ) = 0.14 × α − 0.23 × (1 − α). Solving the above equation for α gives α= 0.23 = 0.622. 0.14 + 0.23 Portfolio P with standard deviation zero has weight 0.622 on asset A and weight 0...

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(d) H0 : μ = 4.4 H1 : μ < 4.4 4.35 0.18 0.02 100 3. A teacher claims that students in Class A put in more hours studying compared to other students. The mean numbers of hours spent studying per week is 25 hours with a standard deviation of 3 hours per week. A sample of 27 Class A students was selected at random and the mean number of hours spent studying per week was found to be 26 hours. Can the teacher’s claim be accepted at 5% significance level? 4. Trying to encourage...

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02+16.04+16.05+16.01+16.02+16.02+16.03+16.01+16+16.07)/12=16.03 (b) Calculate the sample standard deviation. =0.0193 3.2. The bore diameters of eight randomly selected bearings are shown here (in mm): 50.001, 50.002, 49.998, 50.006, 50.005, 49.996, 50.003, 50.004 (a) Calculate the sample average. (50.001+50.002+ 49.998+50.006+50.005+49.996+50.003+50.004)/8=50.001 (b) Calculate the sample standard deviation. =3.2186 3.4. Consider the furnace temperature data in Exercise 3.3 (The nine measurements...

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curve within plus and minus two standard deviations of the mean and practically all (99.73 percent) of the area under the normal curve is within three standard deviations of the mean? Yes. According to the Empirical Rule: - 68% of the area under the curve is within +/- 1 standard deviation of the mean - 95% of the area under the curve is within +/- 2 standard deviations of the mean - Virtually all, 99.7% of the area under the curve is within +/- 3 standard deviations of the mean Is a z-score...

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price Annual dividend High growth £68 £2.5 Normal growth £54 £1.5 No growth £45 £0.5 Assuming all three scenarios are equally likely, calculate: a) the expected holding-period return; b) the variance and standard deviation of the holding-period return; c) the expected return and standard deviation of a portfolio invested 35% in Beta Plc and 65% in Treasury bills. The return on the bill is 5%. 2. Consider an investment in a broad portfolio of stocks (e.g., an index fund), which we will refer to...

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values. Standard Deviation The standard deviation tells you the approximate average distance of cases from the mean. This is easier to comprehend than the squared distance of cases from the mean. The standard deviation is directly related to the variance. If you know the value of the variance, you can easily figure out the value of the standard deviation. The reverse is also true. If you know the value of the standard deviation, you can easily calculate the value...

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which the performance of portfolio in a given period of time is measured. In Sharpe index, three things must be known:  the portfolio return,  the risk free rate of return - use the average return (over the given period of time).  the standard deviation of the portfolio – it is measure the systematic risk of the portfolio. The ratio describes how much excess return you are receiving for the extra volatility that you endure for holding a riskier asset Properly compensated for the additional...

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Unfortunately, your small firm cannot afford the expensive databases that would provide all this information with a few simple keystrokes, but that’s why they hired you. Specifically, you have been asked to determine the monthly average returns and standard deviations for the 12 stocks for the past five years. The stocks (with their symbols in parentheses) are: Apple Computer (AAPL) Hershey (HSY) Archer Daniels Midland (ADM) Motorola...

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the expected standard deviation for XYZ stock? 4. A T-bill pays 6 percent rate of return. Would risk-averse investors invest in a risky portfolio that pays 12 percent with a probability of 40 percent or 2 percent with a probability of 60 percent? A) Yes, because they are rewarded with a risk premium. B) No, because they are not rewarded with a risk premium. C) No, because the risk premium is small. D) Cannot be determined. E) None of the above 5. In the mean-standard deviation graph, which...

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distinguish between the two in order to use the correct formula? mean; median; mode; range; quartiles; variance; standard deviation. 2. The following numbers represent the weights in pounds of six 7year old children in Mrs. Jones' 2nd grade class. {25, 60, 51, 47, 49, 45} Find the mean; median; mode; range; quartiles; variance; standard deviation. 3. If the variance is 846, what is the standard deviation? 4. If we have the following data 34, 38, 22, 21, 29, 37, 40, 41, 22, 20, 49, 47, 20, 31, 34, 66 Draw a...

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Complete Parts A, B, and C below. Part A 1. Why is a z score a standard score? Why can standard scores be used to compare scores from different distributions? 2. For the following set of scores, fill in the cells. The mean is 74.13 and the standard deviation is 9.98. Raw score Z score 68.0 ? ? –1.6 82.0 ? ? 1.8 69.0 ? ? –0.5 85.0 ? ? 1.7 72.0 ? 3. Questions 3a through 3d are based on a distribution of scores with and the standard deviation = 6.38. Draw a small picture to help you see what is required...

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determined from historical records that demand for sand during leadtime averages 50 tons. In addition, suppose the manager determined that the demand during leadtime could be described by a normal distribution that has a mean of 50 tons and a standard deviation of 5 tons. Answer the following questions, assuming that the manager is willing to accept a stockout risk of no more than 3 percent: a) What value of z is appropriate? b) How much safety stock should be held? c) What reorder point should...

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client can quickly learn whether the process is operating satisfactorily or corrective actions needs to be taken. Summary of Statistics  Sample 1  Sample 2  Sample 3  Sample 4 Mean 11.96 12.10 12.14 12.15 Standard Error 0.04 0.04 0.04 0.02 Standard Deviation 0.22 0.23 0.23 0.16 Sample Variance 0.05 0.05 0.05 0.03 Sum 358.69 362.90 364.08 364.46 From the summary of statistics we can see that mean has an upward trend. Mean value differ from sample to sample. Here...

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and a standard deviation of 0.018 inch. The customer will buy only those pins with lengths in the interval inch. In other words, the customer wants the length to be 1.00 inch but will accept up to 0.02 inch deviation on either side. This 0.02 inch is known as the tolerance. 1. What percentage of the pins will be acceptable to the consumer? In order to improve percentage accepted, the production manager and the engineers discuss adjusting the population mean and the standard deviation of...

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We can do a lot of good statistics with the normal curve, but virtually none with any other curve. Let us assume that we have recorded the 1000 ages and computed the mean and standard deviation of these ages. Assuming the mean age came out as 40 years and the standard deviation as 6 years we can do the following predictions. Chebyshev’s Theorem In the case of a scatter diagram that seems to be anything but a normal curve, all we can go by is Chebyshev’s theorem...

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intelligence test is 100, and the standard deviation is 16. The mean for the creativity test is 115, and the standard deviation is 14. What statistic would you use to compare the two scores from these two different distributions (the intelligence test distribution and the creativity test distribution)? Compute this statistic and determine on which test, if either, the student performed better. Explain your answer. (10 pts) Intelligence test score = 123, mean = 100, standard diviation = 16 Creativity...

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organization, analysis, interpretation, and presentation of data. It provides a more accurate way of expressing data rather than mere observation. This experiment used the different statistical concepts such as the Q test, mean, standard deviation, relative standard deviation, range, relative range, and confidence limits or confidence intervals. The results generated from these tests are used as a basis to check whether the values obtained from weighing 10, 25 centavo coins using an analytical balance...

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Fall 2011 - MGMT 305 - Quiz 1 Multiple Choices (1 point each) Name: ___________________________________________ ID: _______________________ ____ 1. The standard deviation of a sample of 100 observations equals 64. The variance of the sample equals a. 8 b. 10 c. 6400 d. 4,096 ____ 2. The weights (in pounds) of a sample of 36 individuals were recorded and the following statistics were calculated. mean = 160 range = 60 mode = 165 variance = 324 median = 170 The coefficient...

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Customer Service ………………….. The 3 year risk is a statistical measure of the month-to-month ups and downs of a fund's returns. Money market funds, which have stable asset values, have standard deviations close to zero. Volatile, aggressive, growth funds can have standard deviations of 12% or more. Standard Deviation - Detailed Definition Risk may be defined in terms of the uncertainty of the expected return, and uncertainty is generally associated with variability. Available empirical evidence...

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/ N * Population standard deviation = σ = sqrt [ Σ ( Xi - μ )2 / N ] * Population variance = σ2 = Σ ( Xi - μ )2 / N * Variance of population proportion = σP2 = PQ / n * Standardized score = Z = (X - μ) / σ * Population correlation coefficient = ρ = [ 1 / N ] * Σ { [ (Xi - μX) / σx ] * [ (Yi - μY) / σy ] } Statistics Unless otherwise noted, these formulas assume simple random sampling. * Sample mean = x = ( Σ xi ) / n * Sample standard deviation = s = sqrt [ Σ ( xi - x )2 /...

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the standard deviation for large company stocks over this period was: Standard deviation = (0.058136)1/2 Standard deviation = 0.2411 or 24.11% Using the equation for variance, we find the variance for T-bills over this period was: Variance = 1/5[(.0729 – .0655)2 + (.0799 – .0655)2 + (.0587 – .0655)2 + (.0507 – .0655)2 + (.0545 – .0655)2 + (.0764 – .0655)2] Variance = 0.000153 And the standard deviation...

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1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. Click on Stat. Click on Basic Statistics. Click on Display Descriptive Statistics We need to get a value for the standard deviation in order to conduct the test. Double-click FILL. Click the OK button (note the value for the sample standard deviation, .512 for this example). Click on Stat. Click on Basic Statistics. We will use a large sample test of a population mean because our sample size is >30. Therefore, click on 1Sample...

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|0.466 |Accepted | C. Reported Values Different statistical parameters were solved including the mean (x), standard deviation (s), relative standard deviation (RSD), range (R), relative range (RR), confidence limits at 95% confidence level (CL), and pooled standard deviation (Sp). In the following table is the summary of all the values solved. Table 3. Summary of values of statistical parameters Data Set |x |s |RSD (ppt) |R |RR (ppt)...

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interval measurement. Descriptive statistics are used because in most cases, it isn't possible to present all of your data in any form that your reader will be able to quickly interpret. The mean, the mode, the median, the range, and the standard deviation are all examples of descriptive statistics. The mean, median, and the mode are all measures of central tendency. They attempt to describe what the typical data point might look like. In essence they are all different forms of 'the average.'...

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6. What information must you input to a computer program in order to derive theportfolios that make up the efficient frontier u. Expected returns, Covariances and correlations. v. Standard deviations, variances and Covariances. w. Expected returns, standard deviations and variances. x. Expected returns, variances and Correlations. 7. The Markowitz model is based on several assumptions regarding investor behavior. Which of the following is an assumption of...

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from its mean is called the deviation from the mean. * •If the data is tightly packed around the mean, the standard deviation and variance will be relatively small. * • If the data is widely dispersed about the mean, the standard deviation and variance will be relatively large. * Population Variance: * Sample Variance: OR * * When calculating the variance, round to one more decimal place than what is given in the data. * The standard deviation is the square root of the...

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Analysis 1. All Sales | Inside |   | Outside |   |   |   |   |   |   |   | Mean | 64925 | Mean | 59289 | Mean | 70562 | Standard Error | 989 | Standard Error | 1115 | Standard Error | 1276 | Median | 61490 | Median | 56407 | Median | 69000 | Mode | 53464 | Mode | 53464 | Mode | #N/A | Standard Deviation | 10839 | Standard Deviation | 8639 | Standard Deviation | 9884 | Sample Variance | 117476832 | Sample Variance | 74634297 | Sample Variance | 97692326 | Kurtosis | -1 | Kurtosis |...

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tendencies could be very misleading. The measure of dispersion will describe the spread of the data and the variation around the central value. There are two measures of dispersion, variance (range) and standard deviation. A common measure of dispersion is using the standard deviation. The standard deviation is simply the square root of the sample variance (Lind, Marchal, Wathem, 2005). Based on the statistical data collected for Team Solutions of the Georgia High School Graduation tests we have made...

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of 25% (Anderson, Sweeney, &amp; Williams, 2012). The measure of variability is expressed through an element of dispersion across a population sample. Variability is measured through the calculation of range, interquartile range, variance, standard deviation, and coefficient of variation. The range is not commonly used as it is influenced significantly by outliers; however, it is measured by the subtracting the smallest value by the largest value. Interquartile range represents the difference...

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quartile = 3 (50 + 1) / 4 = 38.25 => 5.57 B) Compute the range, interquartile range, variance, standard deviation, and coefficient of variation. Range = X largest – X smallest = 5.77 – 5.25 => 0.52 Interquartile range = quartile 3 – quartile 1 = 5.57 – 5.44 => 0.13 Variance = 0.011 Standard deviation = √Variance = √0.011 = 0.1049 Coefficient of variation = standard deviation / mean = 0.1049 / 5.5014 ...

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Material Week Two Practice Problems Prepare a written response to the following questions. Chapter 2 12. For the following scores, find the mean, median, sum of squared deviations, variance, and standard deviation: 1,112; 1,245; 1,361; 1,372; 1,472 Mean 1312.4 Median 1361 Variance 123.36 Sum of squares 76089.2 Standard diviation 76089.2/5=15217.84=SQR 123.36 16. A psychologist interested in political behavior measured the square footage of the desks in the official office for four U.S. governors...

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expectations realistic? Please explain. Below is the table (Table 4) which includes the expected return and the standard deviations for equal investments in High-Tech and Counter-Cyclical stocks. Expected value is 0,0545 and the standard deviation is 0,0132. The risk level is less than the risk level of investing in only one of the two stocks ( See the excel file for standard deviations of non-diversified portfolio). The expected return is realistic since there is not much difference when compared...

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