Question:
The paired t-test is best defined as which of the following?
The paired t-test is best defined as which of the following?
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Paired = same subjects measured before and after.
Updated On: Jun 23, 2026
- Test used to assess quantitative observations before and after an intervention
- Test that is used when the observations are in the form of proportions (for qualitative data)
- Test applied when separate observations are made on individuals of two separate groups, and these need to be compared
- None
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The Correct Option is A
Solution and Explanation
Step 1: A paired t-test compares the means of two related samples, that is two measurements taken on the same individuals. The classic situation is a "before and after" intervention scenario.
Step 2: Because the two readings are paired (same subjects), the test analyses the differences within each pair and checks whether the mean difference is significantly different from zero. This makes option (a) the correct definition.
Step 3: Proportions point to the chi-square test, so option (b) is wrong. Comparing two separate independent groups describes the unpaired (independent) t-test, so option (c) is wrong. Therefore the paired t-test is the test for quantitative observations before and after an intervention.
Step 2: Because the two readings are paired (same subjects), the test analyses the differences within each pair and checks whether the mean difference is significantly different from zero. This makes option (a) the correct definition.
Step 3: Proportions point to the chi-square test, so option (b) is wrong. Comparing two separate independent groups describes the unpaired (independent) t-test, so option (c) is wrong. Therefore the paired t-test is the test for quantitative observations before and after an intervention.
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