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0 votes
8.7k views
in Statistics by (47.3k points)
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In the formula

For finding the mean of grouped data di’s are deviations from a of

(A) Lower limits of the classes

(B) Upper limits of the classes

(C) Mid points of the classes

(D) Frequencies of the class marks

1 Answer

+1 vote
by (48.8k points)
selected by
 
Best answer

(C) Mid points of the classes

Explanation:

We know,

di = xi – a

Where,

xi are data and ‘a’ is the assumed mean

So, di are the deviations from of mid – points of the classes.

Hence, the option (C) is correct

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