Question

find mean for the following. distribution table CI 15-20,20-25,25-30,35-40,40-45, F . 3,6,12,8,6,2​

Answer 1

Answer:

x = 27.5,32.5,37.5,42.5,47.5,52.5

fx= 82.5, 195, 450, 340, 285, 105

Total fx = 1457.5

Total frequency = 37

Mean = Total fx/ Total frequency

= 1457.5/37

= 39.39189