Chapter 7, Problem 6E

Explanation of Solution

Method “stdev()” to find standard deviation:

//Definition of class

public class Text

{

    //Definition of main method

    public static void main(String[] args)

    {

        //Create an array

int[] list={1, -2, 4, -4 , 9 , -6, 16, -8 , 25, -10};

        //Call the method stdev(list2)

        System.out.println(stdev(list));

    }

    //Definition of method stdev()

    public static double stdev(int[] arr)

    {

//Check whether the length of the array equals to 1

        if (arr.length == 1)

        {

            //Return 0.0

            return 0.0;

        }

        //Declare the variable "total"

        int total = 0;

        //Traverse the loop till it reaches the length

        for (int i = 0; i < arr...