HELP ASAP PLEASEE- Erica wants to know if warming up will help runners sprint faster. Twenty track and field athletes volunteered to participate in her study. She randomly assigns 10 athletes to warm-up for 10 minutes. All 20 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 11.9 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 Erica conclude from her study?

Question

iwanttogotostanford · Answer

ANSW CHOICES: The difference in the means is not significant because a difference of 1 is very likely.
 The difference in the means is not significant because a difference of 1 is not very likely.
 The difference in the means is significant because a difference of 1 is very likely.
 The difference in the means is significant because a difference of 1 is not very likely.

iwanttogotostanford · Answer

DOT PLOT:

iwanttogotostanford · Answer

@Directrix @jim_thompson5910

iwanttogotostanford · Answer

@anx @Kaylee04 @sweetnikkie072

iwanttogotostanford · Answer

i THINK it is D but I am not sure....

kaylee04 · Answer

let me look real quick then me will help ok?

iwanttogotostanford · Answer

@imqwerty @triciaal

deathlynine · Answer

I don't think its D, I think its A but I don't know.