`Variance`¶

Returns the variance of a list.

$ wo 'Variance[{}]'
Variance[{}]

A Rational among the values keeps the variance exact; a machine number anywhere makes it a machine number.

$ wo 'Variance[{1/2, 3/2}]'
1/2

$ wo 'Head[Variance[{1., 2., 3.}]]'
Real

Variance¶