Encyclopedia > Weighted average

  Article Content

Weighted mean

Redirected from Weighted average

Given a set of data, X={x1, x2, ..., xn} and corresponding weights, W={w1, w2, ..., wn} the weighted mean is calculated as

<math>
\bar{x} = \frac{ \sum_{i=1}^n w_i \cdot x_i}{\sum_{i=1}^n w_i} </math>

Note that if all the weights are equal, the weighted mean is the same as the arithmetic mean.

back to summary statistics -- central tendency

See also: average



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
North Haven, New York

... couples living together, 5.6% have a female householder with no husband present, and 37.7% are non-families. 30.9% of all households are made up of individuals and ...

 
 
 
This page was created in 26.4 ms