Question

Question about experiments?

Answer 1

Elaine wants to know if coffee will help students perform better on English tests. Twenty-four of her friends have volunteered to participate in her study. She randomly assigns 12 friends to drink water and 12 to drink coffee. All 24 participants take the same math test. She calculates the mean for each group and determines that the mean for the coffee group was 93% and the mean for the water group was 90%. To test the difference of means, she re-randomized the data 100 times, and the differences are plotted in the dot plot below. What can Emily conclude from her study?

Answer 2

Yes I do

Answer 3

kk

Answer 4

Obviously she needs help.
You calling her that is a bit creepy. LOL js

Answer 5

I think the answer would be the difference in the means is significant because a difference of 3 is not very likely.

Answer 6

tht was accident im on my tablet right now and puts words for me sometimes , ok so lets start with the helping

Answer 7

to start, what grade are you in so that I can know if I am eligible to help you

Answer 8

From the plotted data it can be concluded that a difference of 3 is not very likely right?

Answer 9

I'm a senior

Answer 10

OMG 0.0 im not eligible to help, lol im a freshman XC

Answer 11

Ok. Thanks anyway

Answer 12

welcome

Answer 13

@esshotwired @tHe_FiZiCx99 can either of you tell me if I'm on the right track?

Answer 14

I'm doing my own exam atm xD I can try in a few minutes though, if you still need help that is.

Answer 15

No problem

Answer 16

What throws me if is that it says, "she re-randomized the data 100 times"

She converted each mean into a percent, if you undo the percent by multiplying by 100 it's 93, if you multiply is by 12 that's the total score of the coffee group. Subtract it from the water group and divide by 12 it's 3. So having a difference if 3 would actually be significant. If that makes any sense to you cx

Answer 17

It's pretty obvious why it would be significant >.>

Answer 18

The negative's only add up to 9, the 0 has almost half of the coffee and water group, more so water than coffee.