Do students respond differently after using
Biofeedback when compared to before learning to use Biofeedback.
Hint: Anxiety symptoms scale scores where higher scores indicate
increased anxiety symptoms). Run the proper t test.
Before
After
10
3
12
5
16
6
12
4
14
7
14
6
Following table shows the calculations for paired data:
Before | After | d=before-after | (d-mean)^2 |
10 | 3 | 7 | 0.6889 |
12 | 5 | 7 | 0.6889 |
16 | 6 | 10 | 4.7089 |
12 | 4 | 8 | 0.0289 |
14 | 7 | 7 | 0.6889 |
14 | 6 | 8 | 0.0289 |
Total | 47 | 6.8334 |
Sample size: n = 6
Now,
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