If other factors are held constant,which of the following sets of data is most likely to produce a significant value for the repeated-measures t statistic?
A)n = 15 and MD = 2
B)n = 15 and MD = 4
C)n = 30 and MD = 2
D)n = 30 and MD = 4

Question

Quizplus · Accepted Answer

The repeated-measures t test compares the means of two related groups on the same variable, and is used to test whether the differences between the two means are statistically significant. The t statistic takes into account the magnitude of the difference between the two means, as well as the size of the sample and the variability within each group. Therefore, a larger sample size (n = 30) and a larger difference between the means (MD = 4) are more likely to produce a significant t statistic compared to the other options with smaller sample sizes or smaller differences between the means. Therefore, D is the best choice.

If Other Factors Are Held Constant,which of the Following Sets