Question

Below are the data collected from two random samples of 500 American adults on the number of hours they spend doing leisure and sports activities per day (rounded to the nearest hour):


Number of hours spent doing leisure and sports activities per day 1 2 3 4 5
Sample A: Number of adults 70 90 135 140 65
Sample B: Number of adults 80 80 130 135 75


Dan concludes that adults spend a mean of 3 hours each day doing leisure and sports activities. Bret thinks the mean is 4 hours. Who is correct—Dan or Bret? Explain your answer in two or three sentences.

Answer 1

@Haichi

Answer 2

@SolomonZelman

Answer 3

Well you have to figure out the mean for both Sample A and B

Answer 4

hold on let me put a better table

Answer 5

that.

Answer 6

Well you have to figure out the mean for both Sample A and B

Answer 7

Figure that out then you shall have your answer

Answer 8

ok wiat

Answer 9

A = 100

Answer 10

B = 100

Answer 11

i dont get it @Haichi

Answer 12

@SolomonZelman

Answer 13

@ganeshie8

Answer 14

@ganeshie8 i dont get it

Answer 15

I think what the question is asking for is what is the 'true' mean of this data. I just typed a frequency-based mean into my calculator, 1*(70+80)+2*(90+80) and so on, then divided by the total number of people sampled (1000), which amounted to 3.085. I'm guessing they want to to say that Dan found the mean, then explain the math, and say that Brett actually found the mode, the most common # of hours spent. Does this make sense?

Answer 16

yeah thanks man

Answer 17

Do you need more help on this question or a different question? (your PM was unclear)

Answer 18

yes

Answer 19

ill post it and tag you

Answer 20

Gotcha