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Measures of Dispersion and Variation

8th Grade · Math · Open Global Math

6 lessons

Goal

Quantify data spread using quartiles, IQR, mean absolute deviation, sum of squared deviations, and sample/population variance.

6 lessons
0 of 6 done
  1. Calculating Range and Interquartile Range with Outlier RulesUp next
  2. Calculating Mean Absolute Deviation for Data SetsNot started yet
  3. Interpreting MAD as a Measure of Data SpreadYou are here
  4. Calculating Deviations and the Sum of Squared DeviationsNot started yet
  5. Computing Population and Sample Variance and Standard DeviationNot started yet
  6. Comparing Measures of Spread: IQR vs MAD vs Standard DeviationNot started yet
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Learning standards covered

GlobalOGM.9.SP.2Open Global Math Standards 2026™ · 8th Grade

Compute and interpret measures of center (mean, weighted mean, median, mode) and dispersion (range, quartiles, interquartile range, mean absolute deviation [MAD], sum of squared deviations, variance); display and analyze distributions using histograms and box plots.