java标准差实现代码

public static void main(String[] args) {
    double[] array = {2,3,4,4,7};
    double sum = 0;
    for(int i=0;i<array.length;i++){
        sum+=array[i];
    }
    double average = sum/array.length;
    double standarDeviation = 0;
    double total = 0;
    for(int i=0;i<array.length;i++){
        total+=(array[i]-average)*(array[i]-average);
    }
    standarDeviation = Math.sqrt(total/array.length);//标准差
    System.out.println(standarDeviation);    //1.6733201
}

顶

10