×
×

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

ISBN: 9780321836960 18

## Solution for problem 3RE Chapter 5.5

Elementary Statistics | 12th Edition

• Textbook Solutions
• 2901 Step-by-step solutions solved by professors and subject experts
• Get 24/7 help from StudySoup virtual teaching assistants

Elementary Statistics | 12th Edition

4 5 1 430 Reviews
17
0
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:

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

#### Related chapters

Unlock Textbook Solution