There are three basic categories of descriptive statistics employed by researchers: measures of central tendency, measures of dispersion, and measures of relationship. Describe each procedure, and explain how it might be useful in an action research project.
What will be an ideal response?
Ans: Measures of central tendency indicate, with a single score, what is typical or standard about a group of individuals. Measures of central tendency are often used when a researcher is interested in describing the collective level of performance, attitude, or opinion of a group. Measures of dispersion indicate differences within a group of scores—a measure of dispersion may be calculated when a researcher is interested in understanding the spread of scores on a given test or tool. Measures of relationship indicate how variables are related to each other. While correlations do not indicate causation, researchers may be interested in knowing if two or more variables impact others and in what ways.
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