Stats: Data and Models (3rd Edition)

Published by Pearson
ISBN 10: 0321692551
ISBN 13: 978-0-32169-255-9

Chapter 22 - Comparing Two Proportions - Exercises - Page 541: 6


The samples are not independent.

Work Step by Step

To use the two-proportion z-test we need the two samples to be independent. Here we cannot use the test because the second sample contains data about people in the first sample and thus the samples are not independent.
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