遍历求方差
public static void main(String[] args) {
float []a={11,12,13,14,15,16};//数组
float ava=0;//平均数
计算平均数的循环
for (int i = 0; i <a.length; i++) {
ava+=a[i];
}
ava/=a.length;
计算方差的循环
float diff = 0;
for (int i = 0; i < a.length; i++) {
diff+=(a[i]-ava)*(a[i]-ava);
}
diff/=a.length;
System.out.println(diff);
}