Suppose the sample mean's score on the comparison distribution is more extreme than the cutoff. What would the researcher conclude regarding the colorful wallpaper?
A)She should reject the null hypothesis that the rats in the sample will learn faster.
B)The wallpaper did not have a significant effect on the rate of learning.
C)The color of the chamber had a significant effect on the rate of learning.
D)The results are inconclusive since the null hypothesis cannot be rejected.

Question

Quizplus · Accepted Answer

If the sample mean's score on the comparison distribution is more extreme than the cutoff, it means that the results are statistically significant and the null hypothesis can be rejected. In this case, the researcher would conclude that the color of the chamber had a significant effect on the rate of learning. Therefore, the correct answer is choice C.

Suppose the Sample Mean's Score on the Comparison Distribution Is