Answered: 7. For a population with a standard…

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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7. For a population with a standard deviation of σ = 20, how large a sample is necessary to have a standard error that is equal to 5 points?

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Step 1 Introduction:

Standard deviation: Standard deviation is defined as the positive square root of Variance. It is denoted by σ.

where variance is the average of the squares of the deviation taken from the mean.

Standard Error: The standard deviation of the sampling distribution of an estimator is known as Standard Error.

that is, SE = σ/√n

Sample Size: A sample size is a part of the population chosen for a survey or experiment to make inferences about a population from the sample. Usually, It is denoted by n.

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