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Understanding Basic Statistics 6th Edition by Charles Henry Brase,Corrinne Pellillo Brase
Edition 6ISBN: 978-1111827021Understanding Basic Statistics 6th Edition by Charles Henry Brase,Corrinne Pellillo Brase
Edition 6ISBN: 978-1111827021 Exercise 12
Business: Phone Contact 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 business phone calls should you include in a random sample to be 80% sure that the point estimate
will be within a distance of 0.03 from p
(b) The Book of Odds by Shook and Shook (Signet) 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).
(a) If you have no preliminary estimate for p. how many business phone calls should you include in a random sample to be 80% sure that the point estimate
will be within a distance of 0.03 from p (b) The Book of Odds by Shook and Shook (Signet) 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).
Explanation
Verified
Verified
(a)
In this case,
=1.28 and the marg...
Understanding Basic Statistics 6th Edition by Charles Henry Brase,Corrinne Pellillo Brase
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