If assumed mean (A) = 57.5 Σfidi = –10 and Σfi = 80 then Mean = ______.

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If assumed mean (A) = 57.5 Σfidi = –10 and Σfi = 80 then Mean = 57.375. Explanation: Using the assumed-mean formula `barX = A + (Σf_i d_i)/(Σ f_i). Compute: (Σ f_i d_i) / (Σ f_i) = -$\frac{10}{80}$` = – 0.125 So, mean = 57.5 + (– 0.125) = 57.375

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