Will mark brainliesterin wants to know if warming up will 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? 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.

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

Step-by-step explanation:

Option A is correct.

Step-by-step explanation:

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.

Difference is seconds.

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

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.

$5.41

step-by-step explanation:

$20 - $14.51 = $5.49.