The Basic Practice of Statistics 7th Edition

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

Chapter 14 - Binomial Distributions - Apply Your Knowledge - Page 335: 14.9c

Answer

$1.4491,1.4491$

Work Step by Step

$\sigma=\sqrt{np(1-p)}$ Thus here: $\sigma_Y=\sqrt{np(1-p)}=\sqrt{10\cdot0.7\cdot0.3}=1.4491$ $\sigma_X=\sqrt{np(1-p)}=\sqrt{10\cdot0.3\cdot0.7}=1.4491$
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