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

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

Solution for problem 4RE 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 4RE

Problem 4RE

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

Brown Eyes When randomly selecting 600 people, the probability of exactly 239 people with brown eyes is P(239) = 0.0331. Also, P(239 or fewer) = 0.484. Which of those two probabilities is relevant for determining whether 239 is an unusually low number of people with brown eyes? Is 239 an unusually low number of people with brown eyes?

Step-by-Step Solution:

Answer:

Step 1 of 2

Here, P(239 or fewer) = 0.484 is greater than 0.05

Thus, 239 or fewer is not an unusually low number of people with brown eyes.

P(239) = 0.0331 is unusually low number.

Thus, 239 is unusually low number of people with brown eyes.

Given, n = 600, p = 40% = 0.4, q = 1 - p = 0.6

Step 2 of 2

Chapter 5.5, Problem 4RE is Solved
Textbook: Elementary Statistics
Edition: 12
Author: Mario F. Triola
ISBN: 9780321836960

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