A local grocery store manager was tracking the amount of water customers purchased during the current pandemic.  The store manager had read an article that stated the mean amount of water purchased by Americans was 5.7 gallons, but the store manager claims that customers at the store purchase more than 5.7 gallons of water.   To test this claim, the store manager identified a sample of 25 customers and found that the mean amount of water purchased by the sample was 6.3 gallons with a standard deviation of 1.4 gallons.  Test at the 1% significance level if the mean amount of water purchased is actually higher than 5.7 gallons.   The Questions to answer are attached.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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A local grocery store manager was tracking the amount of water customers purchased during the current pandemic.  The store manager had read an article that stated the mean amount of water purchased by Americans was 5.7 gallons, but the store manager claims that customers at the store purchase more than 5.7 gallons of water.   To test this claim, the store manager identified a sample of 25 customers and found that the mean amount of water purchased by the sample was 6.3 gallons with a standard deviation of 1.4 gallons.  Test at the 1% significance level if the mean amount of water purchased is actually higher than 5.7 gallons.

 

The Questions to answer are attached.

Select the correct ans wer.
(i) Hypotheses
HoiM = ,
(0,1.4, 5.7,6.3, 25)
(0, 14, 5.7,6.3, 25)
(ii) Test statistic
(2,t)
= (-2,143,2.143,0.429-0.429)
(iv) Decision
(reject null hypothesis/Do not reject null hypothesis)
Transcribed Image Text:Select the correct ans wer. (i) Hypotheses HoiM = , (0,1.4, 5.7,6.3, 25) (0, 14, 5.7,6.3, 25) (ii) Test statistic (2,t) = (-2,143,2.143,0.429-0.429) (iv) Decision (reject null hypothesis/Do not reject null hypothesis)
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