Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 10 - Statistics - 10.4 Mean, Median, and Mode - 10.4 Exercises: 18

Answer

The surveyed adults had a mean of around $1.6$ hours of vigorous activity per week.

Work Step by Step

To find the weighted mean, perform the following steps: (1) Add the frequencies to find the total number of adults. (2) For each row, multiply the number of hours per week by the number of adults. (3) Add the results in Step (2). (4) Divide the result in Step (3) by the result in Step (1) (Refer to the attached table below.) Thus, the weighted mean is: $=\dfrac{791}{500} \approx 1.6$
Small 1521478209
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.