Chapter 7.4, Problem 3LC

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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

The standard error is

**Calculation:**

*Sample size:*

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