Reida has developed a program that is designed to increase the reading comprehension scores of sixth graders. She randomly selects three students to participate in her program. When she compares the mean score of the students who completed her program to that of three students who did not participate in the program, she finds no significant difference between the mean scores. What is most likely the reason for the nonsignificant finding?
A)Too strong a manipulation
B)The participation of sixth graders
C)A small sample size
D)A true research hypothesis

Question

Quizplus · Accepted Answer

A small sample size can limit the power of a study, meaning it may not be able to detect a significant difference even if one exists. With only three students in each group, it is possible that there simply was not enough data to identify a significant difference in reading comprehension scores.

Reida Has Developed a Program That Is Designed to Increase