Elementary Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321836960
ISBN 13: 978-0-32183-696-0

Chapter 8 - Hypothesis Testing - 8-2 Basics of Hypothesis Testing - Basic Skills and Concepts: 28

Answer

a) reject the null hypothesis b)there is sufficient evidence to support that the standard deviation of female heights is not 5 cm.

Work Step by Step

a) If the P-value is less than $\alpha$, which is the significance level, then this means the rejection of the null hypothesis. Hence:P=0.0055 is less than $\alpha=0.05$, hence we reject the null hypothesis. b) Hence this means that there is sufficient evidence to support that the standard deviation of female heights is not 5 cm.
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