I would like to know if completed the following question correctly?
- Based on the
information given for the following studies, decide whether to reject the
null hypothesis. Assume that all populations are normally distributed. For
each, give:
a. The
Z-score cutoff (or cutoffs) on the
comparison distribution at which the null hypothesis should be rejected.
b. The
Z-score on the comparison
distribution for the sample score.
c. Your
conclusion.
|
Study |
µ |
σ |
Sample |
p |
Tails of Tests |
|
A |
5 |
1 |
7 |
0.05 |
1 (high predicted) |
|
B |
5 |
1 |
7 |
0.05 |
2 |
|
C |
5 |
1 |
7 |
0.01 |
1 (High predicted) |
|
D |
5 |
1 |
7 |
0.01 |
2 |
Answer:
|
Study |
µ |
σ |
Sample |
p |
Tails of Tests |
z-score cut off at p-level |
z-score for sample score =(Sample |
Conclusion |
|
A |
5 |
1 |
7 |
0.05 |
1 (high predicted) |
1.645 |
(7-5)/1=2 |
Do not reject |
|
B |
5 |
1 |
7 |
0.05 |
2 |
1.96 |
(7-5)/1=2 |
Do not reject |
|
C |
5 |
1 |
7 |
0.01 |
1 (High predicted) |
2.326 |
(7-5)/1=2 |
Reject |
|
D |
5 |
1 |
7 |
0.01 |
2 |
2.575 |
(7-5)/1=2 |
Reject |
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