Carter wants to know if warming up will help runners sprint faster. Thirty track and field athletes volunteered to participate in his study. He randomly assigns 15 athletes to warm-up for 10 minutes. All 30 participants sprint the same distance. She calculates the mean for each group and determines that the mean for the warm-up group was 10.7 seconds and the mean for the other group was 13.2 seconds. To test the difference of means, he re-randomized the data 54 times and the differences are plotted in the dot plot below. What can Carter conclude from his study?

Question

anonymous · Answer

The difference in the means is significant because a difference of 2.5 is very likely. The difference in the means is not significant because a difference of 2.5 is very likely. The difference in the means is significant because a difference of 2.5 is not very likely. The difference in the means is not significant because a difference of 2.5 is not very likely. It came with a graph https://ave.brainhoney.com/Resource/19798183,AFC,0,0,0,3/Assets/60323_51e58ecb/09_11_g10_q03_a.jpg To tell you the truth I honestly don't even know what to do.

anonymous · Answer

I picked D I was wrong it was C.