Mathematics · important
Assumed mean method for mean for JEE
Measures of dispersion; calculation of mean, median, mode of grouped and ungrouped data
Formula
\(\bar{x}=a+\frac{\sum f_i d_i}{\sum f_i}\), \(d_i=x_i-a\)
Variables: \(a\): assumed mean, \(x_i\): value or class mark, \(f_i\): frequency.
Conditions: Used for discrete or grouped data.
Quick calculation of mean when values are large.