A companys data analyst performed a two sample t-test to compare the mean time to pack some
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A company’s data analyst performed a two sample t-test to compare the mean time to pack some jewelry using two separate machines. Curious, a manager asks the analyst if he used an equal variance t-test. His answer was no, that the degrees of freedom of the approximate t-test that he used was 60 and therefore the results of either method should be similar. Comment on the analyst’s logic.
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The analysts logic is not entirely correct While it is true that the results of an equal variance ttest and a Welchs approximate ttest might be simila...View the full answer
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Related Book For 
Principles Of Managerial Statistics And Data Science
ISBN: 9781119486411
1st Edition
Authors: Roberto Rivera
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