October 2019
Beginner to intermediate
674 pages
16h 43m
English
Content preview from Mastering pandas - Second Edition
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Measures of variability, dispersion, or spread
Another characteristic of distribution that we measure in descriptive statistics is variability.
Variability specifies how much the data points are different from each other or dispersed. Measures of variability are important because they provide an insight into the nature of the data that is not provided by the measures of central tendency.
As an example, suppose we conduct a study to examine how effective a pre-K education program is in lifting test scores of economically disadvantaged children. We can measure the effectiveness not only in terms of the average value of the test scores of the entire sample, but also in terms of the dispersion of the scores. Is it useful for some students and ...
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