Answered: Find the expected value and standard…

Math

Statistics

Find the expected value and standard deviation of the number of newspapers published in these large cities.

Calculus For The Life Sciences

2nd Edition

ISBN:9780321964038

Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Chapter12: Probability

Section12.4: Discrete Random Variables; Applications To Decision Making

Problem 1E

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Question

Suppose that the number of daily newspapers published in cities of over 100,000 population
has the probability distribution given in Table 1. Find the expected value and standard deviation
of the number of newspapers published in these large cities.

Hypothetical Probability Distribution of Number of Daily Newspapers Published in Large Cities:

Number of Papers	1	2	3	4	5	6
Proportion of cities	0.440	.360	.132	.056	.008	.004

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