You have a data set with a large number of outliers. Which measure of dispersion should you use to best describe the data set, and why?

  • Interquartile range (IQR) because it is robust to outliers
  • Range because it covers all values
  • Standard deviation because it gives the average spread
  • Variance because it squares the differences
When dealing with a large number of outliers in a data set, the "Interquartile range (IQR)" is the most suitable measure of dispersion. This is because it measures the statistical spread between the 25th and 75th percentiles, thus excluding outliers.
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