Introductory Statistics 9th Edition

Published by Wiley
ISBN 10: 1-11905-571-7
ISBN 13: 978-1-11905-571-6

Chapter 5 - Section 5.3 - Mean and Standard Deviation of a Discrete Random Variable - Exercises - Page 192: 5.20


Mean =μ = $∑xP(x)$ = 2.48 houses Standard Deviation = $\sqrt∑x^{2}P(x) -μ^{2}$ = $\sqrt 7.84-2.48^{2}$ =1.3 houses It is expected that 2.48 houses are sold per month by a real estate agent, with a standard deviation of 1.3 houses.

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