Elementary Statistics: A Step-by-Step Approach with Formula Card 9th Edition

Published by McGraw-Hill Education
ISBN 10: 0078136334
ISBN 13: 978-0-07813-633-7

Chapter 4 - Probability and Counting Rules - 4-3 The Multiplication Rules and Conditional Probability - Extending the Concepts - Page 226: 56

Answer

a. negative influence of A on B. b. no influence of A on B c. positive influence of A on B

Work Step by Step

Clearly the event "remembers a certain product commercial" have some effects on the event "buys the product". a. P(B|A) = 0.20 The probability is reduced indicating a negative influence of A on B. b. P(B|A) = 0.35 No change of probability indicates no influence of A on B c. P(B|A) = 0.55 An increase in probability indicates a positive influence of A on B
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