5.2 Variability. Common Core Investigation 5.2. Objective. Today I will compare two box-and-whisker plots and gain information from the data distributions. Vocabulary.
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Measures of variability- numbers that indicate how spread out a set of scores is along a distribution. Scores can be bunched up around the mean or spread out significantly along the distribution. The three measures of variability are range, standard deviation, and variance.
Measures of Center - Plotting data in a frequency distribution shows the general shape of the distribution and gives a general sense of how the numbers are bunched. The mean, median, and mode can be used to represent the "center" of the distribution.
Measures of Shape - For distributions summarizing data from continuous measurement scales, statistics can be used to describe how the distribution rises and drops.