Reida Has Developed a Program That Is Designed to Increase

Multiple Choice

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