我想在javascript中计算数据的模式、中位数和标准差

function calculateMode(data) {
  let frequency = {};
  let maxCount = 0;
  let mode = [];

  data.forEach((value) => {
    if (frequency[value]) {
      frequency[value]++;
    } else {
      frequency[value] = 1;
    }

    if (frequency[value] > maxCount) {
      maxCount = frequency[value];
      mode = [value];
    } else if (frequency[value] === maxCount) {
      mode.push(value);
    }
  });

  return mode;
}

const data = [1, 2, 3, 4, 4, 5, 5, 5];
const mode = calculateMode(data);
console.log("Mode:", mode);

function calculateMedian(data) {
  const sortedData = data.sort((a, b) => a - b);
  const midIndex = Math.floor(sortedData.length / 2);

  if (sortedData.length % 2 === 0) {
    return (sortedData[midIndex - 1] + sortedData[midIndex]) / 2;
  } else {
    return sortedData[midIndex];
  }
}

const data = [1, 2, 3, 4, 5];
const median = calculateMedian(data);
console.log("Median:", median);

function calculateStandardDeviation(data) {
  const mean = data.reduce((sum, value) => sum + value, 0) / data.length;
  const squaredDifferences = data.map((value) => Math.pow(value - mean, 2));
  const variance = squaredDifferences.reduce((sum, value) => sum + value, 0) / data.length;
  const standardDeviation = Math.sqrt(variance);

  return standardDeviation;
}

const data = [1, 2, 3, 4, 5];
const standardDeviation = calculateStandardDeviation(data);
console.log("Standard Deviation:", standardDeviation);