Chapter no 1 Formulas

No of Classes= 1+ 3.3 log N

Formula No 2

Range= X Maximum - X Minimum

Formula No 1

Relative Frequency= Class Frequency /Total Frequency

Formula No 3

Percentage Frequency= Class Frequency /Total Frequency * 100

Formula No 5

Mid point of the class = Upper class + lower class / 2

Formula No 4