Question

The daily sale of 100 vegetable vendors is given in the following table.find the mean of the sale by assumed mean method​

Answer 1

Let the assumed mean (A) = 275

Class interval Mid value (xi) di = xi – 275 ui = (xi -275)/50 Frequency fi fiui

100 – 150 125 -150 -3 24 -12

150 – 200 175 -100 -2 40 -80

200 – 250 225 -50 -1 33 -33

250 – 300 275 0 0 28 0

300 – 350 325 50 1 30 30

350 – 400 375 100 2 22 44

400 – 450 425 150 3 16 48

450 – 500 475 200 4 7 28

N = 200 Sum = -35

We have

A = 275, h = 50

Mean = A + h * sum/N = 275 + 50 * -35/200 = 275 – 8.75 = 266.25