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. He 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?

The difference throughout the means isn't significant because a difference of 2.5 isn't very likely. A further explanation is provided below.

Step-by-step explanation:

Given:

The mean time of warm up group,

= 13.2

The mean time of non warm up group,

= 10.7

Now,

The mean difference will be:

=

By substituting the values, we get

=

=

Thus the above is the appropriate response.

(2,20) means that the 2 is 2 hours and 20 is 20$. so there both 20$ for 2 hours only the same price. like it says. so, the dunk tank and the bounce house are the same price (20$) for the same amount of time (2 hours).

hope i