Mathematics · important
Mean deviation about median for JEE
Calculation of standard deviation, variance and mean deviation for grouped and ungrouped data
Formula
\(\text{MD}_{M}=\frac{1}{N}\sum f_i|x_i-M|\)
Variables: \(M\): median, \(x_i\): values/class marks, \(f_i\): frequencies.
Conditions: Mean deviation is minimum when taken about median.
Problems involving least absolute deviation.