Question

(08.01 MC)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. Make sure to use facts to support your answer.

Answer 1

Hi, and welcome to QuestionCove!
I see that your question is closed, but I will try to help answer it anyway.
To calculate the mean, simply find the sum of all the values in each sample and divide it by the number of entries.
For example, for sample A, you would calculate:
(1*70 + 2*90 + 3*135 + 4*140 + 5*65)/(70 + 90 + 135 + 140 + 65) in order to get the mean.
The idea is the same for sample B.