What is this formula called? summation

Question

some summation formula

Does people know what this formula called? I want to google its properties and read about it more - if it has official name

In some contexts this can be the convex hull of the set of points {$(x_1,x_2,..,x_n)$}, i.e., the set of points with the conditions you gave is the smallest convex set containing the points {$(x_1,x_2,..,x_n)$} — user99680, Nov 25 '13 at 00:59

score 3 · Accepted Answer · answered Nov 25 '13 at 01:07

3

It is called a "weighted average" or "weighted mean". The numbers $\mu_i$ are called the "weights".

answered Nov 25 '13 at 01:07

apt1002

For the OP: the weights do not necessarily have to add to $1$ for a general weighted average. – user99680 Nov 25 '13 at 01:14
thanks a lot, i go google it – ERJAN Nov 25 '13 at 01:27

1 Answers1