8 lines
321 B
JavaScript
8 lines
321 B
JavaScript
const standardDeviation = (arr, usePopulation = false) => {
|
|
const mean = arr.reduce((acc, val) => acc + val, 0) / arr.length;
|
|
return Math.sqrt(
|
|
arr.reduce((acc, val) => acc.concat((val - mean) ** 2), []).reduce((acc, val) => acc + val, 0) /
|
|
(arr.length - (usePopulation ? 0 : 1))
|
|
);
|
|
};
|
|
module.exports = standardDeviation; |