Dee fektiv is concerned that too many forms

Dee Fektiv is concerned that too many forms are being filled out incorrectly. She feels that about 10 percent of forms have an error.

a. How large a sample size should Dee use to be 99% certain that she will be within 0.02?

b. Suppose Dee will accept a confidence level of 95 percent that she will be within 0.02. what will the sample size of the forms be now?         

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