ｊｊ - 経済統計練習帳

package h2;
 
import org.apache.commons.math3.stat.descriptive.DescriptiveStatistics;
 
public class pro {
 
    int s,number;
 
    public static void main(String[] args) {
        pro test=new pro();
    }
 
   pro(){ 
 
       number=100;
 
 
 
 
       DescriptiveStatistics sta = new DescriptiveStatistics();
 
        DescriptiveStatistics sta2 = new DescriptiveStatistics();
 
   for(s=1;s<number+1;s++){
   sta.addValue(2*s);
   }
 
   for(s=1;s<number+1;s++){
   sta2.addValue(s);
   }
 
 
 
    double mean = sta.getMean();
double std = sta.getStandardDeviation();
 
double mean2 = sta2.getMean();
double std2 = sta2.getStandardDeviation();
 
System.out.println(std2+","+std);
 
double alpha,beta;
alpha=std*std/(std*std+std2*std2);
beta=std2*std2/(std*std+std2*std2);
 
System.out.println(alpha+","+beta);
 
 
 
   }
}