Question: For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding. How hard is it

For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.

How hard is it to reach a businessperson by phone? Letpbe the proportion of calls to businesspeople for which the caller reaches the person being called on thefirsttry.

(a) If you have no preliminary estimate forp, how many business phone calls should you include in a random sample to be 80% sure that the point estimatepwill be within a distance of0.07fromp? (Round your answer up to the nearest whole number.)

phone calls

(b) A report states that businesspeople can be reached by a single phone call approximately21%of the time. Using this (national) estimate forp, answer part (a). (Round your answer up to the nearest whole number.)

phone calls

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