Position measurements

Position measurements

1. Divide a data set into groups with the same number of individuals

   • They are ordered from smallest to largest.

2. divided into

   • quartiles
     • They are the three values ​​that divide an ordered data set
       • Corresponding
         • at 75%
         • at 25%
         • at 50%
         • Q2, match the median
     • Q1, Q2, Q3
   • deciles
     • They are the 9 values ​​that divide the data series into 10 equal parts
       • Corresponding
         • at 10%
         • at 20%
         • at 90%
   • percentiles
     • They are the 99 values ​​that divide the data series into 100 equal parts
       • Corresponding
         • at 1%
         • and at 99%
         • at 2%...
         • The p50 coincides with the median

3. Values ​​that allow the data set to be divided into equal percentage parts

   • Used to classify an observation within a population or sample