Q1) Based on information given for each of following studies, make a decision whether to reject null hypothesis. For each, provide Z-score cutoff (or cutoffs) on comparison distribution at which null hypothesis must be rejected, Z score on comparison distribution for sample score and your conclusion. Suppose 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
|