#include <stdio.h>

int main()
{
	// 母集団
	int x[] = {44, 100, 63, 99, 25, 47, 96, 42, 70, 100, 25, 80, 98, 49, 9, 46, 92, 65, 57, 50, 55, 95, 33, 7, 5, 56, 3, 25, 85, 96};
	int m = sizeof x / sizeof (int);
	int i;
	double u;
	double s2;
	double sum;

	// 相加平均
	sum = 0;
	for (i = 0; i < m; i++) {
		sum += x[i];
	}
	u = sum / m;

	// 母分散
	sum = 0;
	for (i = 0; i < m; i++) {
		sum += (u - x[i]) * (u - x[i]);
	}
	s2 = sum / m;

	// 出力
	printf("平均値=%f\n", u);
	printf("分散=%f\n", s2);

	return 0;
}