Suppose you want to estimate the proportion of traditional college students on yourcampus who own their own car You have no preconceived idea of what thatproportion might be. What sample size is needed if you wish to be 90% confident thatyour estimate is within 0.04 of the true proportion?A sample size of(Round up to the nearest whole number.)is needed.

Using excel formula “=NORM.S.INV(1-(0.10/2))”, the z value is obtained as 1.645. As there is no preconceived idea of the proportion, consider sample proportion as 0.5.A sample size of 423 is needed.

Answered: Suppose you want to estimate the…

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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You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estimation for the population proportion. You would like to be 90% confident that you estimate is within 5% of the true population proportion. How large of a sample size is required?
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You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 27%. You would like to be 99% confident that your estimate is within 3.5% of the true population proportion. How large of a sample size is required?
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You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 62%. You would like to be 99% confident that your estimate is within 2.5% of the true population proportion. How large of a sample size is required? Do not round mid-calculation.
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