Asked by Brandon
The Centers for Disease Control reported the percentage of people 18 years of age and older who smoke (CDC website, December 14, 2014). Suppose that a study designed to collect new data on smokers and nonsmokers uses a preliminary estimate of the proportion who smoke of .30.
a. How large a sample should be taken to estimate the proportion of smokers in the population with a margin of error of .02 (to the nearest whole number)? Use 95% confidence.
b. Assume that the study uses your sample size recommendation in part (a) and finds 520 smokers. What is the point estimate of the proportion of smokers in the population (to 4 decimals)?
c. What is the 95% confidence interval for the proportion of smokers in the population (to 4 decimals)?
( , )
In order to solve this problem, part a is necessary to lead to the answers in the following problems. So I don't want to worry about problem b and c until I have a figured out. What I have so far is that to find a sample size, I should set up the equation as such:
[(1.96)^2(#)^2]/(.02)^2. I could easily solve this problem but I just don't know how to solve for the missing value.
a. How large a sample should be taken to estimate the proportion of smokers in the population with a margin of error of .02 (to the nearest whole number)? Use 95% confidence.
b. Assume that the study uses your sample size recommendation in part (a) and finds 520 smokers. What is the point estimate of the proportion of smokers in the population (to 4 decimals)?
c. What is the 95% confidence interval for the proportion of smokers in the population (to 4 decimals)?
( , )
In order to solve this problem, part a is necessary to lead to the answers in the following problems. So I don't want to worry about problem b and c until I have a figured out. What I have so far is that to find a sample size, I should set up the equation as such:
[(1.96)^2(#)^2]/(.02)^2. I could easily solve this problem but I just don't know how to solve for the missing value.
Answers
Answered by
Ms.sue
Go to this link to find your answer
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.