Paired T-test is used when the groups are dependent. It is used in 'before-after' or 'case-control' studies. For example checking average cholesterol levels of same patients before and after dose.
You can either enter data or paste it directly from Excel to input samples in the calculator below.
| Sample 1 | Sample 2 | |
| 1 | 310 | 360 |
| 2 | 398 | 343 |
| 3 | 276 | 253 |
| 4 | 286 | 242 |
| 5 | ||
| 6 | ||
| 7 | ||
| 8 | ||
| 9 | ||
| 10 |
p-value (One-tailed) = 0.250716
p-value (Two-tailed) = 0.501432
Degree of freedom = 3
Means for two groups are not significantly different from each other at 5% significance level(One-tailed)
Means for two groups are not significantly different from each other at 5% significance level(Two-tailed)
Assumptions of Paired Samples T-Test
- The differences between paired observations should follow a normal distribution.
- Only the paired groups can be used to perform the paired test.
- Data must be continuous
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