Elementary Statistics: Picturing the World (6th Edition)

Published by Pearson
ISBN 10: 0321911210
ISBN 13: 978-0-32191-121-6

Chapter 5 - Normal Probability Distributions - Section 5.1 Introduction to Normal Distributions and the Standard Normal Distribution - Exercises - Page 243: 37

Answer

(a) The shape is approximately symmetric, therefore, it is reasonable to assume that the life spans are normally distributed. (b) mean= 37234.6875; standard deviation= 6259.2054 (c) The mean is less than the manufacturer's claim but the standard deviation is larger than the manufacturer's claim.

Work Step by Step

As given above
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