))23
-0.26
4
-0.05
5
1.86
6
0.68
7
0.05
8
0.27
9
2.47
10
-1.39
Manual Calculations: First, plot the data for the two sample graphically in form of a scatter-plot and mark the sample means.
| cases [i] | Sample1 | |
(Yi-) |
(Yi-)2 |
| 1 | -1.02 | |||
| 2 | 1.42 | |||
|
3 |
-0.26 |
|||
|
4 |
-0.05 |
|||
|
5 |
1.86
|
|||
|
6 |
0.68
|
|||
|
7
|
0.05
|
|||
|
8
|
0.27 |
|||
|
9
|
2.47
|
|||
|
10 |
-1.39 |
|||
| Σ |
| cases [i] | Sample1 | |
(Yi-) |
(Yi-)2 |
| 1 | -0.84 | |||
| 2 | 0.12 | |||
|
3 |
-0.57 |
|||
|
4 |
-1.09 |
|||
|
5 |
0.21
|
|||
|
6 |
-0.13
|
|||
|
7
|
0.94
|
|||
|
8
|
0.87 |
|||
|
9
|
-0.35
|
|||
|
10 |
-0.40 |
|||
| Σ |
mean in group 0 : 0.403
mean in group 1: -0.124
diff = 0.527
s2[1] = 1.50369
s2[2] = 0.45147
n1 = n2 = 10
pooled se estimate = 0.44217
t = 1.19184413432143
df = n1-1 + n2-1 = 18