Mathematics · essential
Arithmetic mean using frequencies for JEE
Measures of dispersion; calculation of mean, median, mode of grouped and ungrouped data
Formula
\(\bar{x}=\frac{\sum f_i x_i}{\sum f_i}\)
Variables: \(x_i\): observation/value, \(f_i\): corresponding frequency, \(N=\sum f_i\): total frequency.
Conditions: For discrete frequency distribution.
Mean of frequency tables.