Confidence interval

mariej

New member
Joined
Dec 8, 2014
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I have one problem I can't figure out. I know how to do it basically but don't I have to have an alpha or a confidence level to complete the claim?Here is the problem:
Test the teacher's claim that scores are higher after one test score is dropped.Show all steps in the hypothesis test and construct confidence interval for the mean difference in scores. 37 scores (before and after) are given
 
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