Dr Kwan's Hypothesizes That Allowing Factory Employees to Listen to Music

Multiple Choice

Dr. Kwan's hypothesizes that allowing factory employees to listen to music while working will improve productivity. After conducting the experiment, Dr. Kwan finds that the group of participants who were allowed to listen to music was more productive than the group who did not, but this difference was not statistically significant. What should Dr. Kwan conclude about the difference between the two groups?

A) It supports his hypothesis.
B) He is likely to find the same effect if he replicated the study.
C) There is an unacceptable chance that the difference is due to random chance.
D) The experiment was biased.