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People were polled on how many books they read the previous year. Initial survey results indicate...

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Basic Math

People were polled on how many books they read the previousyear. Initial survey results indicate that s equals 17.4 books.Complete parts ?(a) through ?(d) below.

a. How many subjects are needed to estimate the mean number ofbooks read the previous year with 90?% ?confidence?

this 90% confidence requires ___ subjects?

b. How many subjects are needed to estimate the mean number ofbooks read the previous year within three books with 90%confidence?

this 90% confidence requires ___ subjects?

c. How many subjects are needed to estimate the mean number ofbooks read the previous year within six books with 99%confidence?

this 99% confidence requires ___ subjects?

Answer & Explanation Solved by verified expert
3.6 Ratings (432 Votes)
Solution Given thats 174aAt 90 confidence level the z is 1 90 1 090 010 2 010 2 005Z2 Z005    See Answer
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