Keisha Performs an Experiment with Two Randomly Assigned Groups of School

question 6

Multiple Choice

Keisha performs an experiment with two randomly assigned groups of school children.The first group is allowed 15 minutes of recess play before a math test,while the second group watches a video before the test.When she analyzes the test scores,she finds that there is a statistical difference between the groups,with the recess group scoring higher,on average,on the test.Which conclusion can be drawn from this result?

• A)The difference between the scores for the two groups is not likely due to their differing pre-test activities and it is probably due to random chance.
• B)The difference between the scores for the two groups is likely due to their differing pre-test activities,and did not happen by chance.
• C)Students who are good at math prefer recess to watching a video.
• D)Students who are good at math prefer watching a video to recess.