Many over-the-counter cold medications come with a warning that the medicine may

Question

Many over-the-counter cold medications come with a warning that the medicine may cause drowsiness. To evaluate this effect, a researcher initially measures reaction times for a sample of n = 36 participants. Each participant is then given a dose of a popular night-time cold medicine, and reaction time is measured again.  

independent measures t-test

repeated measures t-test (i.e., dependent samples t-test)

F (ANOVA) for independent measures

F (ANOVA) for repeated measures (i.e., dependent measures ANOVA)

2-way F (2-way ANOVA).

independent measures t-test

repeated measures t-test (i.e., dependent samples t-test)

F (ANOVA) for independent measures

F (ANOVA) for repeated measures (i.e., dependent measures ANOVA)

2-way F (2-way ANOVA).

Explanation / Answer

From the given information, the observations are dependent. So, apply repeated measure t test.

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