Sandra Has Developed a Program Designed to Increase Reading Comprehension

Multiple Choice

Sandra has developed a program designed to increase reading comprehension scores in 6^th graders.She randomly selects three students and has them participate in her program.When she compares the mean score from the students who completed her program to three students who did not participate in the program,she finds no significant difference between their mean scores.What is most likely the reason for the non-significant finding?

A) Too strong of a manipulation
B) The use of 6^th grade children
C) A small sample size
D) A true research hypothesis