Concept explainers
(a)
To find the conclusion about the accuracy of the claim.
(a)
Answer to Problem 9E
The company's claim is most likely correct
Explanation of Solution
Given:
The population proportion is
Calculation:
The company's claim is most likely correct as more number of adults are surveyed in the population.
(b)
To find the conclusion about the accuracy of the claim.
(b)
Answer to Problem 9E
The company's claim is most likely incorrect.
Explanation of Solution
Given:
The population proportion is
Calculation:
The company's claim is most likely incorrectbecause very less number of people are surveyed in the population.
(c)
To estimate the variation among sample proportions for samples of size
(c)
Answer to Problem 9E
Explanation of Solution
Given:
The population proportion is
Calculation:
The lowest variation is
Therefore range of variation is
Chapter 11 Solutions
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