输入十个数字,返回正态分布的均数跟标准差

using System;using System.Collections.Generic;using System.Text;namespace AppMath{public class Maths{/// <summary>/// 求出数据平均值,并保留三位小数/// </summary>/// <param name="Valist">数据集合</param>/// <returns></returns>public double average(List<double> Valist){double sum = 0;foreach (double d in Valist){sum = sum + d;}double revl = System.Math.Round(sum / Valist.Count, 3);return revl;}/// <summary>/// 求数据集合标准差/// </summary>/// <param name="ValList"></param>/// <returns></returns>public double stdev(List<double> ValList){double avg = average(ValList);double sumstdev = 0;foreach (double d in ValList){sumstdev = sumstdev + (d - avg) * (d - avg);}double stdeval = System.Math.Sqrt(sumstdev);return System.Math.Round(stdeval, 3);}/// <summary>/// 相关系数,要求两个集合数量必须相同/// </summary>/// <param name="array1">数组一</param>/// <param name="array2">数组二</param>/// <returns></returns>public double correl(List<double> array1, List<double> array2){//数组一double avg1 = average(array1);double stdev1 = stdev(array1);//数组二double avg2 = average(array2);double stdev2 = stdev(array2);double sum = 0;for (int i = 0; i < array1.Count && i < array2.Count; i++){sum = sum + ((array1[i] - avg1) / stdev1) * ((array2[i] - avg2) / stdev2);}return Math.Round(sum, 3);} }}