returns. (iii) Find the mean‚ median‚ range and standard deviation for the 1990 returns. Annual Returns % (1990) Mean 12.91865979 Median 11.38 Standard Deviation 9.297513067 Range 75.01 (iv) Repeat part (iii) for the 1998 returns. Annual Returns % (1998) Mean 6.355463918 Median 5.4 Standard Deviation 5.170830853 Range 42.76 (v) Which was the better year for investors? • 1990 was the better year for investors in regards to annual returns being consistent with the mean of 12.9% compare
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figure out the least squares line that relates y (work-life balance score for each MBA alumnus) to x (average number of hours worked per week)‚ which is y= β0 + β1x + . For the GMAC data‚ the slope (β1) is -0.347 whereas the intercept (β0) is 62.499. By plugging in the slope and the intercept‚ the least squares line would be: y= 62.499 + (-0.347) x. This least squares line indicates that the estimated mean work-life balance score decreases by -0.347 average number of hours per week. Next‚ we have
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Unit 6. Normal Distribution Solution to problems Statistics I. International Group Departamento de Economa Aplicada Universitat de Valncia May 20‚ 2010 Problem 35 Random variable X : weekly ticket sales (units) of a museum. X ∼ N(1000‚ 180) Find the probability of weekly sales exceeding 850 tickets. Find the probability of the interval 1000 to 1200 Take 5 weeks at random. Find the probability of weekly sales not exceeding 850 tickets in more than two weeks Ticket price is 4.5 Euros
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. 2. Explain why a product or system might have an overall reliability that is low even though it is comprised of components that have fairly high reliabilities. 4. A product engineer has developed the following equation for the cost of a system component: C _ (10 P ) 2 ‚ where C is the cost in dollars and P is the probability that the component will operate as expected. The system is composed of two identical components‚ both of which must operate for the system to operate. The engineer
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Journal and The Economist daily. II. Become intimate with Microsoft Excel. III. Know the fundamentals of Accounting. IV. Refresh working knowledge of Statistics. Harvard Business School Dean Announces 5 New Priorities What does this mean for you? During the interview‚ you will be asked to articulate why a particular school’s curriculum is a good fit for you and your professional goals. Make sure you understand the distinctions between different programs — which ones offer case-method
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80-20 Rule For Pitchers I strongly suggest every high school‚ college‚ and pro pitcher take a good look at this email because it directly impacts you. For those not in high school yet I also suggest you take a good look. Avoid making the same mistakes of those who have gone before you. Avoid the problems associated with arm health and having your velocity dip or simply stand still for way too long. My 80 - 20 Rule and What You Should Know Simple: Ask Yourself how
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The distribution of the earth’s population across the globe is uneven. The earth contains many different environments with only few parts suitable for human habitation. Around 70% of the earth’s surface is covered in water‚ leaving only 30% as land; however within this portion exist many physical features that restrict human habitation. Only around 11% of the earth’s surface poses no serious threat to human settlement and 80% of the world’s 6.7 billion people live on 10% of the earth’s surface
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Homework 3 Probability 1. As part of a Pick Your Prize promotion‚ a store invited customers to choose which of three prizes they’d like to win. They also kept track of respondents’ gender. The following contingency table shows the results: | MP3 Player | Camera | Bike | Total | Men | 62 | 117 | 60 | 239 | Woman | 101 | 130 | 30 | 261 | Total | 163 | 247 | 90 | 500 | What is the probability that: a. a randomly selected customer would pick the camera? 247/500= 0.494=
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STA1101 Normal Distribution and Continuous random variables CONTINUOUS RANDOM VARIABLES A random variable whose values are not countable is called a _CONTINUOUS RANDOM VARIABLE._ THE NORMAL DISTRIBUTION The _NORMAL PROBABILITY DISTRIBUTION_ is given by a bell-shaped(symmetric) curve. THE STANDARD NORMAL DISTRIBUTION The normal distribution with and is called the _STANDARD NORMAL DISTRIBUTION._ Example 1: Find the area under the standard normal curve between z = 0 and z = 1.95 from z
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(a) Suppose we take a random sample of size 100 from a discrete distribution in this manner: A green die and a red die are thrown simultaneously 100 times and let Xi denote the sum of the spots on the two dice on the ith throw‚ i = 1‚ 2‚...100. Find the probability that the sample mean number of spots on the two dice is less than 7.5. n = 100 µ = 7 µ[pic] = 7 σ = 2.41 σ[pic] = 2.41 /[pic] |X |2 |3
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