Q3Multiple choiceExercise 13.1
If xi’s are the mid points of the class intervals of grouped data, fi’s are the corresponding frequencies and x is the mean, then ( fi xi − x ) is equal to
- (A)0
- (B)–1
- (C)1
- (D)2
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(A) 0
If xi’s are the mid points of the class intervals of grouped data, fi’s are the corresponding frequencies and x is the mean, then ( fi xi − x ) is equal to
(A) 0