The mean of a discrete frequency distribution xᵢ/fᵢ; i = 1, 2, ..., n is given by
A.Σfᵢxᵢ/Σfᵢ
B.1/nnΣᵢ=1fᵢxᵢ
C.nΣi=1fixᵢ/nΣᵢ=1xᵢ
D.nΣi=1fixi/nΣi=1i
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The mean of the discrete frequency distribution is : (A) ∑fixi/∑fi
- ∑fixi is the total quantity, or each value multiplied by its frequency.
- ∑fi is the total number of objects included to calculate mean.
Hence, dividing the two terms will give us the correct answer, that is the mean of the frequency distribution.
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