⚡ Paired-samples t test in 3 steps

A quick recipe on the practice survey dataset. Press the button to load the data and run it, or follow the steps yourself after File → Sample dataset.

Load the data and run it

What are the steps?

1. Analyze → Compare Means → Paired-Samples T Test…
2. Variable 1: pre, Variable 2: post.
3. Press OK; read the Paired Samples Test row.

What result should I see?

mean difference −3.07, t(149) = −6.36, p < .001, d_z = −0.52

How to read every number: guide page. Worked through on a full study: Blood pressure before and after a lifestyle programme.