sum = 0.0;
for (i = 0; i < TBL_SIZE; ++i) {
sum += tbl[i];
}
heikin = sum / TBL_SIZE;

sum = 0.0;
for (i = 0; i < TBL_SIZE; ++i) {
double t = tbl[i] - heikin;
sum += t * t;
}
bunsan = sum / TBL_SIZE;

printf("平均 %lf\n", heikin);
printf("分散 %lf\n", bunsan);

return 0;
}