Question

We take a random sample of 50 households in order to estimate the percentage of all homes in the United States that have a refrigerator. It turns out that 49 of the 50 homes in our sample have a refrigerator. Can we use the formulas above to make a confidence interval in this situation?

Answer 1

No, in such a skewed situation- with only 1 home that does not have a refrigerator - the normal curve would be a very poor approximation to the distribution of sample proportions.

Explanation:

Answer 2

What are the formula options?

Explanation: