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People were polled on how many books they read the previous year. Initial survey results indicate that sequals = 17.4 books.

i need help with part "B" below, please.

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


=17.4


17.4 books. Complete parts ​(a) through ​(d) below.

​(a) How many subjects are needed to estimate the mean number of books read the previous year within four


four books with 90


90​% ​confidence?

This 90 %


90% confidence level requires

52


52 subjects. ​(Round up to the nearest​ subject.)

​(b) How many subjects are needed to estimate the mean number of books read the previous year within two


two books with 90


90​% ​confidence?

This 90 %


90% confidence level requires

nothing


subjects. ​(Round up to the nearest​ subject.)

Top Answer

part "B n ≥ ( Zc*σ / E ) 2 =( 1.645*17.4... View the full answer

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