MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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In most cases, if you have the variance, how do you compute standard
deviation?
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- What is the relationship between the variance and the standard deviation for a sample data set? A. The standard deviation is equal to half the variance. B. The standard deviation is equal to two times the variance. C. The standard deviation is the square root of the variance. D. The standard deviation is the square of the variance.arrow_forwardYou are comparing data from two similar experiments that have a mean of 53. Experiment A has a standard deviation of 3.4 and experiment B has a standard deviation of 1.5. What does this tell you about the data in the experiments?arrow_forwardFind the variance if X~N(0, 7) and 95% of the data are between -7 and 7.arrow_forward
- What is the standard error of the mean?arrow_forwardFor her test grades, Gena has a mean = 65 and standard deviation = 25. Patti has a mean = 65 and standard deviation = 5. For which of the students can you more accurately predict the next test score, and why? Consider the variability of scores. Who is more likely to do either extremely well or extremely poorly on the next exam, and why? Explain the reason for adjusting the formula of the standard deviation/variance with n - 1 in the denominator?arrow_forwardTrue or false. If the standard deviation of a dataset is 0, the mean must also be 0.arrow_forward
- IQ scores are normally distributed with a mean of 100 and a variance of 225. What percentage of people score between 130 and 145?arrow_forwardA successful basketball player has a height of 6 feet 11 inches, or 211 cm. Based on statistics from a data set, his height converts to the z score of 5.17. How many standard deviations is his height above the mean?arrow_forwardI need help with understanding standard deviation. How to calculate it from the mean?arrow_forward
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