N N N - Lowest Lower Boundary 15. What is the formula in getting the mean deviation of grouped data? cube root offrac sumlimits fXm-xx2N B. D. Highest Upper Boundary A. frac sumlimits f/Xm-overline X|N frac sumlimits fXm - overline x2N - Lowest Lower Boundary 16, What is the formula in getting the variance of grouped data?
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