In which of the following situations can you construct a confidence interval for the population proportion with only what is given?
A)The sample proportion and the margin of error.
B)The sample proportion and the sample size.
C)The number of individuals in the sample with the trait of interest, and the total sample size.
D)All of the above.

Question

Quizplus · Accepted Answer

For constructing a confidence interval for the population proportion, we need the sample proportion and either the margin of error or the sample size. Option A gives us both of these pieces of information. Option B only gives us the sample proportion and sample size, but we can use the sample size to calculate the margin of error. Option C gives us the two counts (with the trait of interest and without), but we would also need the sample size to calculate the sample proportion and the margin of error. Therefore, option D gives us all the necessary information to construct a confidence interval.

In Which of the Following Situations Can You Construct a Confidence