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15. Professor Sigma randomly selects a sample of five test scores from her history class. They are: 65 82 73 47 88 a) Find the mean. b) Find the standard deviation. Remember that it's a sample. Round to the nearest whole number. c) The student who got the 47 is named Bob. Compute poor Bob's z-score.

15. Professor Sigma randomly selects a sample of five test scores from her history class. They are: 65 82 73 47 88 a) Find the mean. b) Find the standard deviation. Remember that it's a sample. Round to the nearest whole number. c) The student who got the 47 is named Bob. Compute poor Bob's z-score.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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15. Professor Sigma randomly selects a sample of five test scores from her history class. They are: 65 82 73 47 88 a) Find the mean. b) Find the standard deviation. Remember that it's a sample. Round to the nearest whole number. c) The student who got the 47 is named Bob. Compute poor Bob's z-score. d) Since this is just a sample, there are other students in the class not represented here. For example, Bob's friend Amy earned a z-score of +1.75. Interpret this number: did she do better than average, roughly average, or worse than average on the test? e) Determine Amy's test score by using z = 1.75, u = answer to part (a), and a = answer to part (b).
Transcribed Image Text:15. Professor Sigma randomly selects a sample of five test scores from her history class. They are: 65 82 73 47 88 a) Find the mean. b) Find the standard deviation. Remember that it's a sample. Round to the nearest whole number. c) The student who got the 47 is named Bob. Compute poor Bob's z-score. d) Since this is just a sample, there are other students in the class not represented here. For example, Bob's friend Amy earned a z-score of +1.75. Interpret this number: did she do better than average, roughly average, or worse than average on the test? e) Determine Amy's test score by using z = 1.75, u = answer to part (a), and a = answer to part (b).
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