Computer Applications
Write a program that computes the standard deviation of N real numbers. The standard deviation s is computed according to: The variable is the average of N input values through . The program first prompts the user for N and then declares an array of size N.
Answer
import java.util.Scanner;
public class KboatStdDev
{
public static void main(String args[]) {
Scanner in = new Scanner(System.in);
System.out.print("Enter N:");
int n = in.nextInt();
double a[] = new double[n];
System.out.println("Enter the numbers:");
for (int i = 0; i < n; i++) {
a[i] = in.nextDouble();
}
double sum = 0;
for (int i = 0; i < n; i++) {
sum += a[i];
}
double avg = sum / n;
double z = 0;
for (int i = 0; i < n; i++) {
z += Math.pow(a[i] - avg, 2);
}
double s = Math.sqrt(z / n);
System.out.println("Standard Deviation(s) = " + s);
}
}Output
Related Questions
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(a) Average marks obtained by each student.
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