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Initial survey results indicate that sequals = 17.4 books.

i need help with Part "C" 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

205


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



​(c) What effect does doubling the required accuracy have on the sample​ size?

A.

Doubling the required accuracy nearly quarters the sample size.

B.

Doubling the required accuracy nearly quadruples the sample size.

C.

Doubling the required accuracy nearly doubles the sample size.

D.

Doubling the required accuracy nearly halves the sample size.

Top Answer

Part "C" since 205 / 52 = 3.94 which is almost... View the full answer

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