The 5 hour energy drink should keep a person feeling awake while driving for 5 h

Question

The 5 hour energy drink should keep a person feeling awake while driving for 5 hours, regardless of their age. Stacy just doesn’t believe it. So she has 50 twenty year olds, 50 thirty year olds, 50 forty year olds, and 50 fifty year olds consume a 5 hour energy drink, and then Stacy measured the participants’ awareness after 5 hours of driving. What test should she use to analyze her results?
a.   Single-sample Z-Test
b.   Single-sample t-test
c.   Independent-measures t-test
d.   Repeated-measures t-test (Paired-samples t-test)
e.   Independent-measures ANOVA

Explanation / Answer

Correct answer: option (D)   Repeated-measures t-test (Paired-samples t-test)

since

The paired sample t-test, sometimes called the dependent sample t-test, is a statistical procedure used to determine whether the mean difference between two sets of observations is zero. In a paired sample t-test, each subject or entity is measured twice, resulting in pairs of observations

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