Position measurements

Position measurements

1. are

   • Position measures divide a data set into groups with the same number of individuals. To calculate the position measures it is necessary that the data are ordered from smallest to largest.
     • quartiles
       • the quartiles are the three values ​​of the variable that divide a data set into four equal parts Q1, Q2, Q3 determine the values ​​corresponding to 25%, 50% and 75% of the data.
         • QK=K(n+1)/4
     • quintiles
       • A quintile is one fifth of a population. They divide this into five equal parts, each one of them contains 20% of the population data, there are four quintiles that are denoted Q1, Q2, Q3 and Q4
         • VK=K(n+1)/5
     • deciles
       • the deciles are nine values ​​that divide the data series into ten equal parts, the deciles give the values ​​corresponding to 10%, 20%...90%
         • DK=K(n+1)/10
     • persentiles
       • Persentiles are the 99 values ​​that divide the data series into 100 equal parts. Percentiles give the values ​​at 1%, 2%...99% of the data.
         • PK=K(n+1)/100