/* S0330.java
 *       頻度検定 
 *         (C) H.Ishikawa 2008 
 */

package simulation;
import java.applet.*;
import java.awt.*;

public class S0230 extends Applet{

	public  void paint(Graphics g){
		
		int NUMBER = 10000;         /* 発生させる乱数の数 */
		int j;                      /* forのカウンタ */ 
		int i;                      /* 0.1ごとのキザミの番号 */
		int f[] = new int [10];    /* キザミiに落ちる乱数の数 */
		double f0;                 /* 理論度数 */
		double xs = 0.0;           /* カイ自乗の値 */
		  
		f0 = NUMBER/10.0;
  
		for (j = 1; j <= NUMBER; j ++){
			i = (int)(Math.random() * 10);
			f[i] = f[i] + 1;
		}
		g.drawString("     i       f[i]", 10, 10);
  
		/*頻度の検定*/
		for (i = 0; i <= 9; i ++){
			g.drawString("     " + i , 10 , 20 + 10 * i);
			g.drawString("     " + f[i] , 30 , 20 + 10 * i);
			xs = xs + (f[i] - f0) * (f[i] - f0) / f0;
		}
		g.drawString("xs = " +  xs , 10, 30 + 10 * i);
	}
}