Elementary Statistics (12th Edition)

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

Chapter 5 - Discrete Probability Distributions - 5-3 Binomial Probability Distributions - Basic Skills and Concepts - Page 220: 33


0.1007. 12 is not an unusually high number.

Work Step by Step

$P(X=12)={20\choose 12} \cdot (0.48)^{12}\cdot (0.52)^8=0.1007.$ $P(X\geq12)>P(X=12)=0.1007>0.05$, therefore 12 is not an unusually high number.
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