Elementary Statistics (12th Edition)

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

Chapter 9 - Inferences from Two Samples - 9-4 Two Dependent Samples (Matched Pairs) - Basic Skills and Concepts - Page 473: 1


a)False b)False c)True d)False e)True

Work Step by Step

a) Voluntary response data is not a simple random sample, but a convenience sample, hence it is false. b) The requirement for a sample to be considered large is that it contains $30$ or more matched pairs, hence it is false. c) The sample is small (less than $30$), the data need to be approximately normally distributed, hence it is true. d) Women from Texas and Utah are not matched, hence it is false.. e)The confidence interval is one-sided and then the confidence level is $1$ minus by twice the significance level, hence it is true.
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