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Answer: In Exercises, assume that 40% of the population

Elementary Statistics | 12th Edition | ISBN: 9780321836960 | Authors: Mario F. Triola ISBN: 9780321836960 18

Solution for problem 3RE Chapter 5.5

Elementary Statistics | 12th Edition

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Elementary Statistics | 12th Edition | ISBN: 9780321836960 | Authors: Mario F. Triola

Elementary Statistics | 12th Edition

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Problem 3RE

In Exercises, assume that 40% of the population has brown eyes (based on data from Dr. P. Sorita at Indiana University).

Brown Eyes Groups of 600 people are randomly selected. Find the mean and standard deviation for the numbers of people with brown eyes in such groups, then use the range rule of thumb to identify the range of usual values for those with brown eyes. For such a group of 600 randomly selected people, is 200 with brown eyes unusually low or high?

Step-by-Step Solution:

Answer :

Step 1 of 2:

Given, 40% of the people has brown eyes

n = 600 , p = 40% = 0.40

 The procedure yields a binomial distribution.

Where, mean = = np

                           = 600(0.40)

                        = 240

Variance = npq

               = (600)(0.40)(0.60)

               = 144

Standard deviation =  =

                                = 12

Step 2 of 2

Chapter 5.5, Problem 3RE is Solved
Textbook: Elementary Statistics
Edition: 12
Author: Mario F. Triola
ISBN: 9780321836960

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Answer: In Exercises, assume that 40% of the population

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