Statistics – Class X – Part 2

Watch the second video session on “Statistics” for Class Xth – concepts and solved questions

Statistics – Class X – Part 2
1. Step-deviation method- Explanation and what is its need?

2. Also things to note that :

a. the step-deviation method will be convenient to apply if all the di’s have a common factor.
b. The mean obtained by all the three methods- Direct method, Assumed Mean Method and Step Deviation Method, is the same.
c. The assumed mean method and step-deviation method are just simplified forms of the direct method.
d. The formula  still holds if a and h are not as given above, but are any non-zero numbers satisfying 

NCERT Exercise 14.1

Question 1 , 2 explained in details.


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