Parametric
t-test (paired samples)
Compares the means of two measurements on one group.
Variables
- First measurementContinuous — 1
- Second measurementContinuous — 1
Options
- Alternative hypothesisTwo-sided · One-sided (greater) · One-sided (less)
What it reports
t, df, p; the CI of the mean difference and Hedges' g.
scipy · Open the accuracy report
When does this apply?
For a design in which one group is measured twice — before and after an intervention, say. The two measurements sit in two separate columns: one row is one observation. The test is computed on the differences; the output is t, the degrees of freedom, p, and Hedges g with a 95% confidence interval. The rank-based alternative is the Wilcoxon signed-rank test.