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Based on the information given for each of the following studies, decide whether to reject the null hypothesis. For each, give the Z-score cutoff (or cutoffs) on the comparison distribution at which the null hypothesis should be rejected, the Z score on the comparison distribution for the sample score and your conclusion. Assume that all population are normally distributed.

            Population

Study

U

O

Sample Score

p

Tail of Tests

A

5

1

7

.05

1 (high predicted)

B

5

1

7

.05

2

C

5

1

7

.01

1 (high predicted)

D

5

1

7

.01

2

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