The Basic Practice of Statistics 7th Edition

Published by W. H. Freeman
ISBN 10: 146414253X
ISBN 13: 978-1-46414-253-6

Chapter 19 - From Data Production to Inference: Part III Review - Supplementary Exercises - Page 450: 19.53a

Answer

According to Empirical Rule, in a normal distribution, 68% of the population is within one S.D, 95% of the population is within two S.D, and 99.7% of the population is within 3 S.D of the mean. Here, we have: μ = 3.3, σ = 0.8. Hence: 3.3 ± 3(0.8) = 0.9 to 5.7 Hence, 0.9 to 5.7 ratings are within this range.

Work Step by Step

According to Empirical Rule, in a normal distribution, 68% of the population is within one S.D, 95% of the population is within two S.D, and 99.7% of the population is within 3 S.D of the mean. Here, we have: μ = 3.3, σ = 0.8. Hence: 3.3 ± 3(0.8) = 0.9 to 5.7 Hence, 0.9 to 5.7 ratings are within this range.
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.

GradeSaver will pay $15 for your literature essays
GradeSaver will pay $25 for your college application essays
GradeSaver will pay $50 for your graduate school essays – Law, Business, or Medical
GradeSaver will pay $10 for your Community Note contributions
GradeSaver will pay $500 for your Textbook Answer contributions