(Statistics: compute deviation) Programming Exercise 5.37 computes the standard deviatio...

(Statistics: compute deviation) Programming Exercise 5.37 computes the standard deviation of numbers. This exercise uses a different but equivalent formula to compute the standard deviation of n numbers.

To compute the standard deviation with this formula, you have to store the individual numbers using an array, so that they can be used after the mean is obtained.

Your program should contain the following methods:

Ref:

(Format an integer) Write a method with the following header to format the integer with the specified width.

public static String format(int number,   int width)

The method returns a string for the number with one or more prefix 0s. The size of the string is the width. For example, format(34,   4) returns 0034 and format(34,   5) returns 00034. If the number is longer than the width, the method returns the string representation for the number. For example, format(34,   1) returns 34.

Write a test program that prompts the user to enter a number and its width and displays a string returned by invoking format(number,   width).