Chapter 7, Problem 8P

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8th Edition

Frederick J Gravetter + 1 other

ISBN: 9781133956570

Textbook Problem

For a sample of *n =* 25 scores, what is the value of the population standard deviation (σ) necessary to produce each of the following a standard error values?

**a.** σ* _{M}* = 10 points?

**b.** σ* _{M}*= 5 points?

**c.** σ* _{M}*= 2 points?

**a.**

To determine

The value of population standard deviation.

Explanation

**Given info:**

The numbers of scores in sample is

**Calculation:**

If

Let

Standard error measures the distance expected on an average between population mean and sample means

**b.**

To determine

The value of population standard deviation.

**c.**

To determine

The value of population standard deviation.

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