The Basic Practice of Statistics 7th Edition

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

Chapter 12 - Introducing Probability - Apply Your Knowledge - Page 289: 12.14a

Answer

In a valid probability model, all probabilities are between 0 and 1 (inclusive) and sum up to 1. In this model, all probabilities are bewteen 0 and 1. Adding all the probabilities: 0.05 + 0.00 + 0.07 + 0.08 + 0.10 + 0.17 + 0.15 + 0.38 = 1 Hence all the probabilities sum to 1. So this is a valid probability model

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