# Standard deviation abstract

Powerful Essays
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 of weights in a lot of calf’s be used to determine which lot should be purchased?
Hypothesis:
The hypothesis proposed in this article is that in using the group average and standard deviation a cattleman can choose a lot of calf’s that is larger in number and closer in average size, thereby, increase the likelihood of a good purchase.
Findings:
The finding in this article prove that choosing a smaller standard deviation will ensure that the lot of calf’s will have a more consistent weight amount the group. The example provided in the text outlines two groups of calves and the standard deviation of both groups, one being 150 lbs and the other at 40 lbs. The second group with the smaller standard deviation helps the cattleman to understand that in the group 66% of the calf’s will fall into the weight range of plus or minus 40 pounds of the average, helping the cattleman to determine that the largest percentage of cattle will be closer in weight that the group with a standard deviation of 150 lbs.
Deviation and Escalation: Decision-making pitfalls illustrated
Basic abstract:
The purpose of the article is to address the rapid and constant changes that are taking place in the business world. These businesses that have to face every day changes range from local franchise investors to multinational corporation managers. These businesses have to have the ability to cope with everyday challenges and properly assess new innovations that can potentially bring

## You May Also Find These Documents Helpful

• Good Essays

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…

• 507 Words
• 2 Pages
Good Essays
• Good Essays

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…

• 1161 Words
• 5 Pages
Good Essays
• Better Essays

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…

• 1144 Words
• 5 Pages
Better Essays
• Satisfactory Essays

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…

• 406 Words
• 4 Pages
Satisfactory Essays
• Satisfactory Essays

Standard Deviation (continued) L.O.: To find the mean and standard deviation from a frequency table. The formula for the standard deviation of a set of data is [pic] Recap question A sample of 60 matchboxes gave the following results for the variable x (the number of matches in a box): [pic]. Calculate the mean and standard deviation for x. Introductory example for finding the mean and standard deviation for a table: The table shows the number of children living…

• 427 Words
• 2 Pages
Satisfactory Essays
• Good Essays

DESCRIPTIVE STATISTICS: NUMERICAL MEASURES MULTIPLE CHOICE QUESTIONS In the following multiple choice questions, circle the correct answer. 1. Which of the following provides a measure of central location for the data? a. standard deviation b. mean c. variance d. range Answer: b 2. A numerical value used as a summary measure for a sample, such as sample mean, is known as a a. population parameter b. sample parameter c. sample statistic…

• 2958 Words
• 12 Pages
Good Essays
• Good Essays

STANDARD DEVIATION The standard deviation is a popular measure of variability. It is used both as a separate entity and as a part of other analyses, such as computing confidence intervals and in hypothesis testing. The standard deviation is the square root of the variance. The population standard devia¬tion is denoted by σ. Like the variance, the standard deviation utilizes the sum of the squared deviations about the mean (SSx). It is computed by averaging these squared deviations (SSX/N) and…

• 539 Words
• 3 Pages
Good Essays
• Satisfactory Essays

The population standard deviation σ of a discrete random variable , Measure how close a random variable tends to be the population mean μ, so you must understand μ before you understand σ If you have a random variable like a bet at a casino or and investment then the standard deviation σ measure the risk, if there is a lot of risk then the standard deviation is high The formulas for standard deviation are given below but you should look at the examples first Population mean Population variance…

• 447 Words
• 2 Pages
Satisfactory Essays
• Good Essays

A. What is the mean age of this sample? What is the standard deviation? The mean age is 47.5 years old. The standard deviation is 10.74832 years. http://www.calculator.net/standard-deviation-calculator.html Sample Standard Deviation, s: 10.748316881702 Sample Standard Variance, s2 115.52631578947 Total Numbers, N 20 Sum: 950 Mean (Average): 47.5 Population Standard Deviation, σ 10.476163419878 Population Standard Variance, σ2 109.75 If it follows the normal distribution The…

• 883 Words
• 4 Pages
Good Essays
• Satisfactory Essays

following for the data in Column K, “The degree of agreement among patrons that Remington’s has large portions,” on the Remington Data worksheet of the Remington’s Data Set workbook: Mean -3.26 Standard deviation-0.911 Range -3 4 Mean 3.261306533 Standard Error 0.064596309 Median 4 Mode 4 Standard Deviation 0.911243075 Sample Variance 0.830363941 Kurtosis -1.16899198 Skewness -0.663704706 Range 3 Minimum 1 Maximum 4 Sum 649 Count 199 Largest(1) 4 Smallest(1) 1 Confidence Level(95.0%) 0.12738505…

• 248 Words
• 2 Pages
Satisfactory Essays