People were polled on how many books they read the previous year

please see attached for the statistics question
February 27, 2020
A researcher wishes to​ estimate, with 95​% ​confidence,
February 27, 2020

People were polled on how many books they read the previous year

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 95% confidence? Initial survey results indicate that sigma =15.1 books.

A 95% confidence level requires __ subjects.

 

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