Question

Erin wants to know if warming up will help runners sprint faster. Twenty-six track and field athletes volunteered to participate in her study. She randomly assigns 13 athletes to warm-up for 10 minutes. All 26 participants sprint the same distance. She calculates the mean for each group and determines that the mean for the warm-up group was 10.9 seconds and the mean for the other group was 12.9 seconds. To test the difference of means, she re-randomized the data 54 times and the differences are plotted in the dot plot below. What can Erin conclude from her study?

Answer 1

I said A but i'm not to sure
The difference in the means is not significant because a difference of 2 is not very likely.

The difference in the means is not significant because a difference of 2 is very likely.

The difference in the means is significant because a difference of 2 is very likely.

The difference in the means is significant because a difference of 2 is not very likely.

Answer 2

Not good in graphs :(

Answer 3

The difference in the means is significant because a difference of 2 is not very likely.

Answer 4

thank you :)

Answer 5

You're welcome :)