An educator has collected a sample of students who took the

An educator has collected a sample of students who took the SAT twice, the first time before any SAT-specific tutoring, and the second time after receiving such tutoring. She wants to know if the mean SAT score differs significantly before and after receiving tutoring.

decide which of the following four methods is appropriate.

One sample t test

Paired samples t test

Independent samples t test

One-way analysis of variance (ANOVA)

Solution

Here same set of students are tested before and after tutoring

Hence

Paired samples t test should be used.