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# People were polled on how many books they read the previous year. How many subjects are needed to estimate the number of books read the previous year...

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People were polled on how many books they read the previous year. How many subjects are needed to estimate the number of books read the previous
year within one book with 90% conﬁdence? Initial survey results indicate that 0‘ = 19.6 books. A90% conﬁdence level requires D subjects.
(Round up to the nearest whole number as needed.)

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Kindly note that to calculate the sample size simply use the formula n =(z*σ /E) 2 Where W is the... View the full answer

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