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
|