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The average score on an exam is 78. A test is given to 40 students and the average on the exam was 82 with a

The average score on an exam is 78. A test is given to 40 students and the average on the exam was 82 with a standard deviation of 14.

a) At the .01 level did the students do better than expected? (p = .039)

b) How do you explain the 4 point increase?

C) Interpret the p-value:

D) What is the only type of error that could have occurred Answer:

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