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這是我到目前爲止。我需要使用文本文件中的數字。如何計算人口標準差?
計算類:
public class Calculations {
public void readFile(String fileName, double[] myArray) throws Exception {
FileReader fr = null;
BufferedReader br;
}
public double computeStandardDeviation(double[] myArray) {
double result = 0;
return result;
}
}
主要類:
public class Main {
private static int NUMBERS=20;
public static void main(String[] args) {
double[] myNumbers = new double[NUMBERS];
Calculations calculations = new Calculations();
try {
calculations.readFile("numbers.txt", myNumbers);
double stdDev = calculations.computeStandardDeviation(myNumbers);
System.out.println("Population Std Dev = " + stdDev);
} catch (Exception e) {
e.printStackTrace();
}
}
}
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