First quartile (25), Median (50), Third quartile (75).
The column headed 25 is the 25th percentile or First quartile column of data. Twenty-five per cent of incumbents in the sample received the amount shown in this column, or less, for the particular benefit.
Twenty-five per cent of positions in the sample have job evaluation points less than or equal to the number shown in this column.
The column headed 50 is the 50th percentile or Median column of data. Fifty per cent of incumbents in the sample received the amount shown in this column, or less, for the particular benefit.
Fifty per cent of positions in the sample have job evaluation points less than or equal to the number shown in this column.
The column headed 75 is the 75th percentile or Third Quartile column of data. Seventy-five per cent of incumbents in the sample received the amount shown in this column, or less, for the particular benefit.
Seventy-five per cent of positions in the sample have job evaluation points less than or equal to the number shown in this column.
THE FIGURES IN THESE COLUMNS CANNOT BE ADDED TO
ARRIVE AT THE INTERMEDIATE TOTALS SHOWN. THE OBJECTIVE OF THESE QUARTILE
COLUMNS IS TO SHOW THE SPREAD OF DATA IN THE SAMPLE.
Note however that the column headed Average does add vertically because averages
are determined on a different basis to percentiles.
