Cheyl Stake is concerned that too many forms are being filled out incorrectly. She feels that about 8 percent of all the forms have an error.
a. How large a sample size should Ms. Stake use to be 99 percent certain she will be within 0.02?
b. How large a sample size should Ms. Stake use to be 90 percent certain she will be within 0.02?
c. Explain the difference between parts a and b in words.
d. Suppose Ms. Stake will accept a confidence level of 95 percent that she will be within 0.02. What will the sample size of forms be now?