88Write a program that prompts the user to enter ten numbers, and displays the
99mean and standard deviations of these numbers using the following formula:
1010*/
11- import java .util .Scanner ;
1211
13- public class Exercise_05_45 {
14- public static void main (String []args ) {
15- Scanner input =new Scanner (System .in );
16- double mean ,// Holds the mean
17- deviation ,// Holds the standard deviation
18- number ;// Holds user input
19- mean =deviation =0 ;// Set mean and deviation to 0
20-
21- // Prompt the user to enter ten numbers
12+ import java .util .Scanner ;
13+ public class Exercises5 {
14+ public static void main (String []args ) {
15+ Scanner input =new Scanner (System .in );
16+ double []numbers =new double [10 ] ;
2217System .out .print ("Enter ten numbers: " );
23-
24- // Compute mean and standard deviation
25- for (int i =1 ;i <=10 ;i ++) {
26- number =input .nextDouble ();
27- mean +=number ;
28- deviation +=Math .pow (number ,2 );
29- }
30- deviation =Math .sqrt ((deviation - (Math .pow (mean ,2 ) /10 )) / (10 -1 ));
31- mean /=10 ;
32-
33- // Display results
34- System .out .println ("The mean is " +mean );
35- System .out .printf ("The standard deviation is %.5f\n " ,deviation );
36- }
37- }
18+ for (int i =0 ;i <10 ;i ++)
19+ numbers [i ] =input .nextDouble ();
20+
21+ double mean ,deviation ;
22+
23+ mean =mean (numbers );
24+ deviation =std (numbers ,mean );
25+
26+ System .out .println ("The mean is " +mean );
27+ System .out .printf ("The standard deviation is %.5f\n " ,deviation );
28+
29+ }
30+ public static double mean (double numArray []){
31+ double sum =0.0 ;
32+ int length =numArray .length ;
33+ for (double num :numArray )
34+ sum +=num ;
35+
36+ double mean =sum /length ;
37+
38+ return mean ;
39+ }
40+
41+ public static double std (double numArray [] ,double mean {
42+ double standardDeviation =0.0 ;
43+ int length =numArray .length ;
44+ for (double num :numArray ) {
45+ standardDeviation +=Math .pow (num -mean ,2 );
46+ }
47+ return Math .sqrt (standardDeviation /(length -1 ));
48+ }
49+ }
