How hard is it to reach a businessperson by phone? Let p be the proportion of calls to businesspeople for which the caller reaches the person being called on the first try. a. If you have no preliminary estimate for p, how many busjness phone calls should you include in a random sample to be 80% sure that the point estimate p will be within a distance of 0.03 from p? b. The Book of Odds reports that businesspeople can be reached by a single phone call approximately 17% of the time. Using this (national) estimate for p, answer part (a). I
How hard is it to reach a businessperson by phone? Let p be the proportion of calls to businesspeople for which the caller reaches the person being called on the first try. a. If you have no preliminary estimate for p, how many busjness phone calls should you include in a random sample to be 80% sure that the point estimate p will be within a distance of 0.03 from p? b. The Book of Odds reports that businesspeople can be reached by a single phone call approximately 17% of the time. Using this (national) estimate for p, answer part (a). I
A First Course in Probability (10th Edition)
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Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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4. How hard is it to reach a businessperson by phone? Let p be the proportion of calls to
businesspeople for which the caller reaches the person being called on the first try.
a. If you have no preliminary estimate for p, how many busjness phone calls should you
include in a random sample to be 80% sure that the point estimate p will be within a
distance of 0.03 from p?
b. The Book of Odds reports that businesspeople can be reached by a single phone call
approximately 17% of the time. Using this (national) estimate for p, answer part (a). I
SUS
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Solution:
4.
a.
From the given information, confidence level is 0.80 and E=0.03.
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