Question

Will give medal and fan.... pleaseeee hlep!! (:


Lars wants to know if warming up will help runners sprint faster. Twenty-four track and field athletes volunteered to participate in his study. He randomly assigns 12 athletes to warm-up for 10 minutes. All 24 participants sprint the same distance. He calculates the mean for each group and determines that the mean for the warm-up group was 7.8 seconds and the mean for the other group was 10.8 seconds. To test the difference of means, he re-randomized the data 225 times and the differences are plotted in the dot plot below.

Answer 1

What can Lars conclude about her study??


The difference in the means is significant because a difference of 3 is very likely.

The difference in the means is significant because a difference of 3 is not very likely.

The difference in the means is not significant because a difference of 3 is not very likely.

The difference in the means is not significant because a difference of 3 is very likely.

Answer 2

@whpalmer4

Answer 3

@BangkokGarrett

Answer 4

I think it is D but I am not sure... I really just want conformation that I am correct... Or it explained to me because I do not really understand what this is asking... @whpalmer4 can you please help me??