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A popular weight-loss app claims that the mean weight loss for all the people who use the service is 22 pounds with a standard deviation of 5.8 pounds. You collect a random sample of 36 people using the app and find the mean weight loss for this group to be 20 pounds. (Son = 36 and = 20.) Use a z-score approach to calculate P(x < 20). Would you consider this sample to be unusual? Show your work by listing your calculator commands.

A popular weight-loss app claims that the mean weight loss for all the people who use the service is 22 pounds with a standard deviation of 5.8 pounds. You collect a random sample of 36 people using the app and find the mean weight loss for this group to be 20 pounds. (Son = 36 and = 20.) Use a z-score approach to calculate P(x < 20). Would you consider this sample to be unusual? Show your work by listing your calculator commands.

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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A popular weight-loss app claims that the mean weight loss for all the people who use the service is 22 pounds with a standard deviation of 5.8 pounds. You collect a random sample of 36 people using the app and find the mean weight loss for this group to be 20 pounds. (So n = 36 and 20.) Use a z-score approach to calculate P(<20). Would you consider this sample to be unusual? Show your work by listing your calculator commands. O Search SAMSUNG = A
Transcribed Image Text:A popular weight-loss app claims that the mean weight loss for all the people who use the service is 22 pounds with a standard deviation of 5.8 pounds. You collect a random sample of 36 people using the app and find the mean weight loss for this group to be 20 pounds. (So n = 36 and 20.) Use a z-score approach to calculate P(<20). Would you consider this sample to be unusual? Show your work by listing your calculator commands. O Search SAMSUNG = A
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