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Confidence interval to test proportion of US households with a dog

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A humane society claims that less than 35% of U.S. households own a dog. In a random sample of 400 U.S. households, 156 say they own a dog.

(5) Describe the population of interest and calculate the numerical value of the statistic p Ì? that that we will use to estimate the population proportion p.

(5) Construct a 95% confidence interval for the proportion of U.S. households with a dog.

(4) Construct a 99% confidence interval for the proportion of U.S. households with a dog.

(6) Describe the relationship between the confidence level and the size of the confidence interval. Explain why this relationship holds.

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Problem: A humane society claims that less than 35% of U.S. households own a dog. In a random sample of 400 U.S. households, 156 say they own a dog.

a) Describe the population of interest and calculate the numerical value of the statistic p ̂ that that we will use to estimate the population proportion p.

b) Construct a 95% confidence interval for the proportion of U.S. households with a dog.

c) Construct a 99% confidence ...

Solution Summary

The expert examines confidence interval to test proportions of US households with a dog.

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