SOLUTION: Textbook Question from Applied Statistics in Business and Economics, by Doane and Seward To test the hypothesis that students who finish an exam first get better grades, Profess

Question 126754: Textbook Question from Applied Statistics in Business and Economics, by Doane and Seward
To test the hypothesis that students who finish an exam first get better grades, Professor Hardtrack kept track of the order in which papers were handed in. The first 25 papers showed a mean score of 69.3 with a standard deviation of 24.9. Is this a significant difference at ? (a) State the hypothesis for a right-tailed test. (b) Obtain a test statistic and p-value assuming equal variances? (c) Is the difference in mean scores large enough to be important? (d) Is it reasonable to assume equal variances? (e) Carry out a formal test for equal variances at , showing all steps clearly.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Answered:
Cheers,
Stan H.
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