variance

Find the mean of squared deviation of numbers from its mean.

Similar: mean, median, modes, variance, range.

function variance(...xs)
// xs: a list of numbers

const xnumber = require('extra-number');


xnumber.variance(1, 2);
// → 0.25

xnumber.variance(1, 2, 3);
// → 0.6666666666666666

xnumber.variance(1, 2, 3, 4);
// → 1.25

References

• Variance: Wikipedia