wedderman6914 wedderman6914

11-03-2024
Mathematics

contestada

If xᵢ's are the midpoints of the class intervals of grouped data, fᵢ's are the corresponding frequencies and x is the mean, then Σ(fᵢxᵢ - x) is equal to:

a. 0
b. -1
c. 1
d. 2

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