Levene's Test
An NPM module providing Levene's parametric statistical test. The test can be used to compute a p-value when performing Analysis of Variance (ANOVA). If the data you are working with is not normally-distributed it is recommended that you use the Brown-Forsythe test instead, which uses the median rather than the mean to compute the test value.
To use it, simply install via NPM and include it in your project file.
var levene = require('levene-test');
To compute the W-test of an array of samples use the test function:
var samples = [[3,3,5,1], [1,2,3]];
console.log(levene.test(samples));
By default the test uses the absolute deviations from the group means. The quadratic (squared) deviations can also be used by specifying the quadratic parameter:
console.log(levene.test(samples), true);