In the step division method of calculating mean, we divide the deviations by the ___ of class intervals to simplify calculations.
In step deviation method to simplify the calculations; we divide the deviation by the width of the class intervals.
In the ___ method of calculating mean, we divide the deviations by a common factor to simplify calculations.
In the ___ method of calculating mean we divide the deviations by the same number to simplify calculations.