Answered: Sample Size for Estimating u The sample…

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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Question

Method for computing the sample size required to obtain a confidence interval with a specified confidence level and margin of error. The number resulting from the formula should be rounded up to the nearest whole number.

a. Why do we want a whole number?

b. Why do we round up instead of down?

FORMULA

Sample Size for Estimating u
The sample size required for a (1 – a)-level confidence interval for u with a
specified margin of error, E, is given by the formula
(Za/2·02
rounded up to the nearest whole number.

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