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Suppose it is know that the standard deviation of the amount customers spend is $8.8 Also suppose David and Susan both want to test the claim the average amount of money customers spend is more than $200 using a sample size of 400, they both get samples independently  In David's sample the mean is 206 In Sue's sample the mean is 215 Calculate the standard error and find the test stat for both David and Sue and answer the questions below Some ideas not in this course but discussed on youtube David's probability value  is  P(Z more than 13.636363636364) Sue's probability value is P(Z more than  34.090909090909) a. The standard error is 0.440 b. David's test stat is 13.636 c. Sue's test stat is 34.09 d. Sue has more evidence that the mean is more than 200 so Sue's p-value will be lower than David's e. Sue has more evidence that the mean is more than 200 so Sues p-value will be higher  than David's

Suppose it is know that the standard deviation of the amount customers spend is $8.8 Also suppose David and Susan both want to test the claim the average amount of money customers spend is more than $200 using a sample size of 400, they both get samples independently  In David's sample the mean is 206 In Sue's sample the mean is 215 Calculate the standard error and find the test stat for both David and Sue and answer the questions below Some ideas not in this course but discussed on youtube David's probability value  is  P(Z more than 13.636363636364) Sue's probability value is P(Z more than  34.090909090909) a. The standard error is 0.440 b. David's test stat is 13.636 c. Sue's test stat is 34.09 d. Sue has more evidence that the mean is more than 200 so Sue's p-value will be lower than David's e. Sue has more evidence that the mean is more than 200 so Sues p-value will be higher  than David's

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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Suppose it is know that the standard deviation of the amount customers spend is $8.8

Also suppose David and Susan both want to test the claim the average amount of money customers spend is more than $200 using a sample size of 400, they both get samples independently 

In David's sample the mean is 206

In Sue's sample the mean is 215

Calculate the standard error and find the test stat for both David and Sue and answer the questions below

Some ideas not in this course but discussed on youtube

David's probability value  is  P(Z more than 13.636363636364)

Sue's probability value is P(Z more than  34.090909090909)

a.
The standard error is 0.440
b.
David's test stat is 13.636
c.
Sue's test stat is 34.09
d.
Sue has more evidence that the mean is more than 200 so Sue's p-value will be lower than David's
e.
Sue has more evidence that the mean is more than 200 so Sues p-value will be higher  than David's
 
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