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What Are Measures of Dispersion and How Are They Different

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Essay

What are measures of dispersion and how are they different from measures of central tendency in terms of what we learn from them?


Definitions:

Percentage Points

A unit for the difference of two percentages, reflecting the absolute difference between them.

Variance

A measure of the dispersion of a set of data points around their mean value.

Population Proportion Variances

The measure of variability or dispersion of proportion values in a population, indicating how much individual proportions deviate from the average population proportion.

Senatorial Election

An electoral process in which voters select candidates to serve as Senators in a legislative body, such as the United States Senate.

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