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 normaldistribution 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 asample. (Enter: "LARGER", "SMALLER" or "SAME SIZE", without the quotes.)

here given , Population standard deviation = 34$ Confidence level = 90% MOE < 4 $

Answered: (a) How large should the sample be if…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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(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.)