2.3 Percentiles, Box Plots, and 5-Number Summary

The common measures of location are quartiles and percentiles.  Quartiles are special percentiles. The first quartile, Q1, is the same as the 25th percentile. 25% of data will be less than 25th percentile; 75% of data will be more than 25th percentile. The second quartile, Q2, is the same as the 50th percentile / median. 50% of data will … Continue reading 2.3 Percentiles, Box Plots, and 5-Number Summary