Question

State the STEP DEVIATION METHOD CLASS X

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Answer 1

The formula used for arithmetic mean of grouped data by step deviation method is, X=A+∑f∑fu×i. A= Assumed mean of the given data. ∑ = Summation of the frequencies given in the grouped data. ∑fu = Summation of the frequencies and deviation of a given mean data. u=i(x−A)

Answer 2

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ARITHMETIC MEAN OF GROUPED DATA USING STEP DEVIATION - FORMULA
Step Deviation Method: Calculating the Mean by using Step Deviation Method.
Mean,
x
=A+h
∑
i=1
n
​
f
i
​

∑
i=1
n
​
f
i
​
u
i
​

​

Where,
h= Class size
u
i
​
=
h
x
i
​
−A
​

A= The middle value that is assumed as the mean for calculation,
∑
i=1
n
​
f
i
​
= Sum of the frequencies given, can be denoted by N.