Elementary Statistics: Picturing the World (6th Edition)

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

Chapter 6 - Confidence Intervals - Section 6.1 Confidence Intervals for the Mean - Exercises - Page 305: 5

Answer

See explanation below.

Work Step by Step

Given from the standard normal table. a = 1-0.8 = .2, Z(0.1) = 1.28
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