mantics><msub><mover><mi>x</mi><mo accent="true">‾</mo></mover><mi>w</mi></msub><annotation encoding="application/x-tex">\bar{x}_w</annotation></semantics></math>
is the weighted mean of
<math display="inline" xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mi>x</mi><annotation encoding="application/x-tex">x</annotation></semantics></math>,
and
<math display="inline" xmlns="http://www.w3.org/1998/Math/MathML"><semantics><msub><mi>N</mi><mi>w</mi></msub><annotation encoding="application/x-tex">N_w</