Chapter 7, Problem 10P

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8th Edition

Frederick J Gravetter + 1 other

ISBN: 9781133956570

Textbook Problem

A sample of *n* = 4 scores has a mean of *M* = 75.

Find the *z*-score for this sample:

**a.** If it was obtained from a population with μ = 80 and σ = 10.

**b.** If it was obtained from a population with μ. = 80 and σ = 20.

**c.** If it was obtained from a population with μ. = 80 and σ = 40.

**a.**

To determine

The *z*-score for given sample.

Explanation

**Given info:**

The number of score is

**Calculation:**

If
*n* represents numbers of scores in each sample. Let *M* represents sample mean. Then,

The *z*-score corresponding to the sample mean is given by:

**b.**

To determine

The *z*-score for given sample.

**c.**

To determine

The *z*-score for given sample.

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