The Basic Practice of Statistics 7th Edition

Published by W. H. Freeman
ISBN 10: 146414253X
ISBN 13: 978-1-46414-253-6

Chapter 22 - Inference about a Population Proportion - Chapter 22 Exercises - Page 534: 22.28b

Answer

Positive direction.

Work Step by Step

Women are more likely to support the bill than men. Thus their sample proportion is more likely to be higher. Thus the bias would be in the positive direction.
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