AP Statistics / Mr. Hansen
2/13/2001

Name: _________________________

Suppose that 15% of the people in a population of size N are left-handed. If we select an SRS of n people from the population, what is the probability that no more than 20% of the people in our sample are left-handed? Be sure to show your work, and justify any approximating techniques used.

1.

Answer the question under the assumption that n = 5, N = 20.

2.

Answer the question under the assumption that n = 5, N = 100.

3.

Answer the question under the assumption that n = 15, N = 1000.

4.

Answer the question under the assumption that n = 30, N = 1000.

5.

Answer the question under the assumption that n = 3500, N = 60,000,000.