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The tip percentage at a restaurant has a mean value of 18% and a standard deviation of 6%. (a) What is the approximate probability that the sample mean tip percentage for a random sample of 40 bills is between 16% and 19%? (b) If the sample size had been 12 rather than 40, could the probability requested in part (a) be calculated from the given information?

The tip percentage at a restaurant has a mean value of 18% and a standard deviation of 6%. (a) What is the approximate probability that the sample mean tip percentage for a random sample of 40 bills is between 16% and 19%? (b) If the sample size had been 12 rather than 40, could the probability requested in part (a) be calculated from the given information?

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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The tip percentage at a restaurant has a mean value of 18% and a standard deviation of 6%. (a) What is the approximate probability that the sample mean tip percentage for a random sample of 40 bills is between 16% and 19%? (b) If the sample size had been 12 rather than 40, could the probability requested in part (a) be calculated from the given information?
Transcribed Image Text:The tip percentage at a restaurant has a mean value of 18% and a standard deviation of 6%. (a) What is the approximate probability that the sample mean tip percentage for a random sample of 40 bills is between 16% and 19%? (b) If the sample size had been 12 rather than 40, could the probability requested in part (a) be calculated from the given information?
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