The mean function displays the average attribute value calculated mathematically. It is the sum of the values divided by the number of values. (E.g.: the mean between 2; 3; 10 is 5).
This function doesn’t work with nominal attributes. For nominal attributes you can use the mode function.
Function and parameters
It identifies the column to which you want to apply the formula. The column parameter is mandatory.
It allows you to group the results by a certain column.
The following example uses the Students Performance dataset.
So, the mean of the math score attribute is 66.089.