Statistics: Informed Decisions Using Data (4th Edition)

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

Chapter 8 - Section 8.1 - Assess Your Understanding - Vocabulary and Skill Building - Page 410: 15a

Answer

Approximately normal distribution with $μ_{x̄} = 80$ and $σ_{x̄} = 2$

Work Step by Step

The distribution is approximately normal (according to the central limit theorem, because the sample size is greater than 30) with $μ_{x̄} = μ = 80$ and $σ_{x̄} = σ / \sqrt n$ $= 14 / \sqrt 49$ = 2
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