Question

find the mean of the following frequency distribution by all the three methods class-03 20 20 to 40 40 to 60 60 to 80 8200 frequency 15 18 21 29 17 ​

Answer 1

Find the mean of the following frequency distribution:

Classes: 0-20 20-40 40-60 60-80 80-100

Frequency: 15 18 21 29 17