Question

Find the mean of the following distribution by step- deviation method.
Daily Expenditure : 100–150 150–200 200–250 250–300 300–350 ,
No. of Households: 4 5 12 2 2 .

Answer 1

SOLUTION IS IN THE ATTACHMENT.
Mean = Σfixi/ Σfi

To calculate the mean of grouped data we have three methods which are:

i)Direct method
(ii)The assumed mean

(iii)The Step deviation

Step deviation method:

Step deviation method is used in the cases where the deviation from the assumed mean multiples of a common number. If the values of di for each class is a multiple of h the calculation become simpler by taking ui= di/h = (xi -a )/h

Here, h is the class size of each class interval.
Mean = a + h ×1/N ×  Σfiui

HOPE THIS WILL HELP YOU....

Answer 2

Answer:

2467.50 step by step method