In 2019, the poverty rate in the U.S. was 10.5%. A local official wants to test whether their county has a different poverty rate than the rest of the U.S. In a random sample of 2000 county residents, 9.3% were below the poverty level. a.) Perform a hypothesis to determine wheather there is evidence that the county's rate is significantly different than the national rate. b.) Create a 95% confidence interval and compare with Po(null). Do the results of the hypothesis test agree with the confidence interval?
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
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1.) In 2019, the poverty rate in the U.S. was 10.5%. A local official wants to test whether their county has a different poverty rate than the rest of the U.S. In a random sample of 2000 county residents, 9.3% were below the poverty level.
a.) Perform a hypothesis to determine wheather there is evidence that the county's rate is significantly different than the national rate.
b.) Create a 95% confidence interval and compare with Po(null). Do the results of the hypothesis test agree with the confidence interval?
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