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Suppose we want a 90% confidence interval for the average amount spent on books by freshmen in their first year at college. The amount spent has a normal distribution with standard deviation $27. (a) How large should the sample be if the margin of error is to be less than $2? Use at least 3 decimal places in your critical value. ANSWER: (b) If we wanted a smaller margin of error, we would need a sample. (Enter. "LARGER", "SMALLER" or "SAME SIZE", without the quotes.)

Suppose we want a 90% confidence interval for the average amount spent on books by freshmen in their first year at college. The amount spent has a normal distribution with standard deviation $27. (a) How large should the sample be if the margin of error is to be less than $2? Use at least 3 decimal places in your critical value. ANSWER: (b) If we wanted a smaller margin of error, we would need a sample. (Enter. "LARGER", "SMALLER" or "SAME SIZE", without the quotes.)

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Suppose we want a 90% confidence interval for the average amount spent on books by freshmen in their first year at college. The amount spent has a normal distribution with standard deviation $27. (a) How large should the sample be if the margin of error is to be less than $2? Use at least 3 decimal places in your critical value. ANSWER: [Text Box] (b) If we wanted a smaller margin of error, we would need a [Text Box] sample. (Enter "LARGER," "SMALLER," or "SAME SIZE," without the quotes.)
Transcribed Image Text:Suppose we want a 90% confidence interval for the average amount spent on books by freshmen in their first year at college. The amount spent has a normal distribution with standard deviation $27. (a) How large should the sample be if the margin of error is to be less than $2? Use at least 3 decimal places in your critical value. ANSWER: [Text Box] (b) If we wanted a smaller margin of error, we would need a [Text Box] sample. (Enter "LARGER," "SMALLER," or "SAME SIZE," without the quotes.)
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