   Chapter 7.4, Problem 3LC Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
ISBN: 9781133956570

Solutions

Chapter
Section Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
ISBN: 9781133956570
Textbook Problem

If a random sample is selected from a population with a standard deviation of σ = 40, then how large a sample is needed to have a standard error of 2 points or less?

To determine

To find: The sample size.

Explanation

Given info:

A sample is selected from a population with a standard deviation of σ=40.

The standard error is σM=2 or less.

Calculation:

Sample size:

n=(σσM)2

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