Independent Samples T-Test
|
|
|---|
| |
U |
df |
p |
Rank-Biserial Correlation |
SE Rank-Biserial Correlation |
|---|
| Sunday BDI |
|
64.500 |
|
|
|
0.286 |
|
-0.290 |
|
0.259 |
|
| Wednesday BDI |
|
96.000 |
|
|
|
< .001 |
|
-0.920 |
|
0.259 |
|
|
| Note.
For the Mann-Whitney test, effect size is given by the rank biserial correlation. |
| Note.
Mann-Whitney U test. |
Assumption Checks
|
|
|---|
| Residuals |
W |
p |
|---|
| Sunday BDI |
|
0.843 |
|
0.004 |
|
| Wednesday BDI |
|
0.866 |
|
0.010 |
|
|
| Note.
Significant results suggest a deviation from normality. |
Descriptives
|
|
|---|
| |
Group |
N |
Mean |
SD |
SE |
Coefficient of variation |
Mean Rank |
Sum Rank |
|---|
| Sunday BDI |
|
Ecstasy |
|
10 |
|
19.600 |
|
6.603 |
|
2.088 |
|
0.337 |
|
11.950 |
|
119.500 |
|
| |
|
Alcohol |
|
10 |
|
16.400 |
|
2.271 |
|
0.718 |
|
0.138 |
|
9.050 |
|
90.500 |
|
| Wednesday BDI |
|
Ecstasy |
|
10 |
|
32.000 |
|
4.784 |
|
1.513 |
|
0.150 |
|
15.100 |
|
151.000 |
|
| |
|
Alcohol |
|
10 |
|
10.100 |
|
7.951 |
|
2.514 |
|
0.787 |
|
5.900 |
|
59.000 |
|
|