This problem focuses on the determination of sample sizes.

Required:

a. Given the constraints of a 7 percent desired upper precision limit, and an estimated population occurrence rate of from 1 to 4 percent, indicate the specific combinations of these factors at both 90 and 95 percent reliability that will result in sample sizes that will not be less than 160 or more than 200

b. At 95 percent reliability, a 5 percent desired upper precision limit, and a 2 percent expected population occurrence rate, sample size is 200 . Compute the new sample size for each of the following changes, assuming other factors are held constant i. Increase desired upper precision limit to 6 percent.

2. Decrease desired upper precision limit to 4 percent.

3. Decrease expected population occurrence rate to 1 percent.

4. Increase expected population occurrence rate to 2.5 percent.

5. Reduce reliability to 90 percent.