SOLUTION: People were polled on how many book they read the previous year. How many subjects are needed to estimate the number of books read the previous year within one book with 99% confi

Algebra ->  Probability-and-statistics -> SOLUTION: People were polled on how many book they read the previous year. How many subjects are needed to estimate the number of books read the previous year within one book with 99% confi      Log On


   

Question 481041: People were polled on how many book they read the previous year. How many subjects are needed to estimate the number of books read the previous year within one book with 99% confidence? Initial survey results indicate that σ=1 books.
A 99% confidence level requires ___subjects.
(round up to the nearest whole number as needed.)
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
People were polled on how many book they read the previous year. How many subjects are needed to estimate the number of books read the previous year within one book with 99% confidence? Initial survey results indicate that σ=1 books.
-------------
n = [z*s/E]^2
= [2.5758*1/1]^2
= 6.6349
---
Round up to n = 7
===================
Cheers,
Stan H.
============






A 99% confidence level requires ___subjects.
(round up to the nearest whole number as needed.)