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

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.

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

@countryrockbabe @coltjoco

Answer 3

@jakashaka123

Answer 4

lol

Answer 5

i really need help.

Answer 6

ill getcha hold up

Answer 7

thank you so much! ;-)

Answer 8

@mkerr017 do you think you can help me with this?

Answer 9

sorry, don't relally understand the question:/

Answer 10

ohh, its ok.

Answer 11

@nirmalnema

Answer 12

@MaimiGirl @DEEISME

Answer 13

yes

Answer 14

do you know how to do this?

Answer 15

im sorry i tryed i cant figure it out

Answer 16

ok

Answer 17

so what type of question is this

Answer 18

what do you think i should put?

Answer 19

the conclusion would be that the runners have a better time so her hypothesis is correct therefore true statement

Answer 20

she can conclude that the runners do better when warming up

Answer 21

by 2 secounds

Answer 22

and she wasted her time

Answer 23

so is it significant?

Answer 24

yes

Answer 25

is that an add on to your question the second thing you put ?

Answer 26

ohh ok, so the difference of 2 is likely?

Answer 27

not really

Answer 28

no its not

Answer 29

ohh so its not likely.

Answer 30

no

Answer 31

im confusing my self and irritated right now

Answer 32

idk why

Answer 33

you were right!
thanks so much :-)

Answer 34

no problem

Answer 35

and thank you cause my head hurts
XD

Answer 36

awww sorry lol.

Answer 37

its ok

Answer 38

i do this for people not myself and i think every one else should do it to