Chapter 4.4, Problem 1LC

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8th Edition

Frederick J Gravetter + 1 other

ISBN: 9781133956570

Textbook Problem

**a.** Sketch a histogram showing the frequency distribution for the following sample of *n* = 5 scores: 3, 1, 9, 4, 3. Locale the mean in your sketch, and estimate the value of the sample standard deviation.

**b.** Calculate *SS,* variance, and standard deviation for this sample. How well does your estimate from part a compare with the real standard deviation?

**(a)**

To determine

**To draw:** The histogram for the frequency distribution of sample scores.

Explanation

**Given info:**

The sample scores are 3, 1, 9, 4 and 3.

**Construction of histogram:**

**Software procedure:**

Step-by-step procedure for constructing histogram by using excel procedure:

- Enter data in to data Excel sheet.
- Select
**Mega Stat**option from**Add-Ins**menu. - Select
**Quantitative**from**Frequency Distributions**. - Select
**Input range**and choose**Histogram**. - Click
**Ok**.

*Calculating the standard deviation***:**

The mean of the sample scores is,

The standard deviation of the sample score is,

**(b)**

To determine

**To find:** The sum of squared deviations, variance and standard deviation for the sample of scores.

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