@accounter/client/src/helpers/statistics.ts

Accounter client application

export const getStandardDeviation = (array: number[]): number => {
  const n = array.length;
  const mean = array.reduce((a, b) => a + b) / n;
  return Math.sqrt(array.map(x => Math.pow(x - mean, 2)).reduce((a, b) => a + b) / n);
};