Chapter 9, Problem 7P

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8th Edition

Frederick J Gravetter + 1 other

ISBN: 9781133956570

Textbook Problem

The following sample was obtained from a population with unknown parameters.

Scores: 6, 12, 0, 13, 4, 7

a. Compute the sample mean and Standard deviation. (Note that these are descriptive values that summarize the sample data.)

b. Compute the estimated standard error for *M.* (Note that this is an inferential value that describes how accurately the sample mean represents the unknown population mean.)

**a.**

To determine

**To Find:** Sample mean and standard deviation for the scores given.

Explanation

**Given info:**

A sample with 6 scores is provided in the question as: 6, 12, 0, 13, 4, 7 and parameters of the population are unknown.

**Calculation:**

Sum of scores, is

Calculate sample mean using formula:

Substitute

Now, formula for standard deviation is:

**b.**

To determine

**To find:** The estimated standard error for mean.

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