v5998 - 経済統計練習帳

<h1>例題1:記述統計</h1>
 
<p>
3,4,5,31,41の平均、標準偏差を求めよ。
</p>
 
<div style="border-style: solid; background-color: lavender;">
<pre>
<code>
package math;
 
import org.apache.commons.math3.stat.descriptive.DescriptiveStatistics;
 
public class pro {
 
    public static void main(String[] args) {
        pro test=new pro();
    }
    pro(){
 
DescriptiveStatistics ds=new DescriptiveStatistics();
 
        ds.addValue(3);
        ds.addValue(4);
        ds.addValue(5);
        ds.addValue(31);
        ds.addValue(41);
 
        double avg=ds.getMean();
 
        System.out.println(avg);
 
double std = ds.getStandardDeviation();
 
  System.out.println(std);
 
}
}
</code>
</pre>
 
<table>
<tr>
<td>クラス</td>
<td>解説</td>
</tr>
<tr>
<td>DescriptiveStatistics</td>
<td>記述統計</td>
</tr>
<tr>
<td>getStandardDeviation()</td>
<td>標準偏差</td>
</tr>
</table>
 
<table>
<tr>
<td>関数</td>
<td>解説</td>
</tr>
<tr>
<td>getMean()</td>
<td>平均</td>
</tr>
<tr>
<td>getStandardDeviation()</td>
<td>標準偏差</td>
</tr>
</table>