Lars wants to know if warming up will 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 9.8 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 lars conclude from her study? a dot plot is shown labeled from negative 2.5 to positive 2. above the negative 2.5 are 3 dots. above the negative 2 are 6 dots. above the negative 1.5 are 9 dots. above the negative 1 are 12 dots. above the negative 0.5 are 6 dots. above the 0.0 are 4 dots. above the 0.5 are 3 dots. above the 1.0 are 7 dots. above the 1.5 are 3 dots. above the 2.0 is 1 dot. answers 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. 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.