An opinion poll asks, “Are you willing to donate your time to help in your child’s elementary school classroom?” Suppose that the proportion of all adults who would say “Yes” to this question is p = 0.4


1. Describe the sampling distribution of p hat if a sample of size 30 is taken.

2. Is it appropriate for a normal curve to be used, why or why not?

3. In this sample of size 30, what is the probability that at least 13 people say ”Yes” to the question posed?