An independent-measures study comparing two treatment conditions produces a t statistic with df = 18.If the two samples are the same size,how many participants were in each of the samples?
A)9
B)10
C)19
D)20

Question

An independent-measures study comparing two treatment conditions produces a t statistic with df = 18.If the two samples are the same size,how many participants were in each of the samples?​
A)​9
B)​10
C)​19
D)​20

Quizplus · Accepted Answer

Since the t-statistic has df = 18, the total sample size must be n1 + n2 = 18 + 2 = 20. If the two samples are the same size, each sample would have n = 10 participants. Therefore, choice B is the correct answer.

An Independent-Measures Study Comparing Two Treatment Conditions Produces a T