Statistics: Informed Decisions Using Data (4th Edition)

Published by Pearson
ISBN 10: 0321757270
ISBN 13: 978-0-32175-727-2

Chapter 7 - Section 7.2 - Consumer Reports - Sunscreens - Page 381: d

Answer

Product A: P(X > 17.5) = 0.0918 Product B: P(X > 17.5) = 0.0099

Work Step by Step

We need to calculate the z values: Product A: $z = \frac{17.5 - 15.5}{1.5} = 1.33$ P(X > 17.5) = P(z > 1.33) = 1 - P(z < 1.33) = 1 - 0.9082 = 0.0918 Product B: $z = \frac{17.5 - 14.7}{1.2} = 2.33$ P(X > 17.5) = P(z > 1.33) = 1 - P(z < 2.33) = 1 - 0.9901 = 0.0099
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.