Chapter 7.3, Problem 1LC

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8th Edition

Frederick J Gravetter + 1 other

ISBN: 9781133956570

Textbook Problem

A sample is selected from a population with a mean of μ = 90 and a standard deviation of σ = 15. Find the z-score for the sample mean for each of the following samples.

**a.***n*= 9 scores with*M*= 100**b.***n*= 25 scores with*M*= 89

**(a)**

To determine

**To find:** The z-score for the sample mean.

Explanation

**Given info:**

A sample is selected from a population with a mean of

**Calculation:**

*The formula for calculating the z-score:*

**(b)**

To determine

**To find:** The z-score for the sample mean.

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