(a) How large should the sample be if the margin of error is to be less than $4? ANSWER: (b) If we wanted a smaller margin of error, we would need a sample. (Enter: "LARGER", "SMALLER" or "SAME SIZE", without the quotes.)

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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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 $34.
(a) How large should the sample be if the margin of error is to be less than $4?
ANSWER:
(b) If we wanted a smaller margin of error, we would need a
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 $34. (a) How large should the sample be if the margin of error is to be less than $4? ANSWER: (b) If we wanted a smaller margin of error, we would need a sample. (Enter: "LARGER", "SMALLER" or "SAME SIZE", without the quotes.)
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