Alternative Equation Formats

The equation on this page is available in multiple formats. Depending on your browser, some formats might not render correctly.

MathML

1 W ∑ i f i w i ( r i / n i − π ^ i ) 2

Math Rendered as SVG

Math as LaTeX Source

$\frac{1}{W}\sum _ if_ iw_ i(r_ i/n_ i-\widehat{\pi }_{i})^2$
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