/*
 * Name: Matthew Britt
 * Date: 11/20/2017
 * Course Number: CSC-111
 * Course Name: Introduction to Java Programming
 * Problem Number: 7.11
 * Email: msbritt0001@student.stcc.edu
 * Short Description of the Problem: Computes the standard deviation and the mean of 10 numbers.
 */
import java.util.Scanner;

public class ComputingDeviation {

	static final int SIZE = 10;

	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		double[] numbers = new double[SIZE];
		System.out.println("Enter " + SIZE + " numbers: ");
		for (int i = 0; i < numbers.length; i++)
			numbers[i] = input.nextDouble();
		System.out.println("The mean is: " + mean(numbers));
		System.out.println("The standard deviation is: " + deviation(numbers));

	}

	public static double mean(double[] x) {
		double total = 0;
		for (int i = 0; i < x.length; i++) {
			total += x[i];
		}
		System.out.println("Total: " + total);
		return total / x.length;

	}

	public static double deviation(double[] x) {
		double mean = mean(x);
		double deviation = 0;
		for (int i = 0; i < x.length; i++) {
			deviation += Math.pow(x[i] - mean, 2);
		}
		return Math.sqrt(deviation / (x.length - 1));
	}
}