Question: A certain statistics instructor, in order to curtail cheating on the exam, makes up three different exams. Concerned that one exam might be more difficult

A certain statistics instructor, in order to curtail cheating on the exam, makes up three different exams. Concerned that one exam might be more difficult than the other exams, the instructor randomly selects 5 scores of each exam to see if the average scores differ. The means for each of the three samples are below:

Exam 1Exam 2Exam 3

MEAN726870

The instructor also calculates (X - X double bar)² = 374.

The instructor gives you this information and asks you, what would you conclude at the 5% level of significance? Show all parts of any test.

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