Write a program that can be used to gather statistical data about the number of

Question

Write a program that can be used to gather statistical data about the number of movies college students see in a month. The program should perform the following steps: A) Ask the user how many students were surveyed. An array of integers with this many elements should then be dynamically allocated. B) Allow the user to enter the number of movies each student saw into the array. C) Calculate and display the average, median, and mode of the values entered. (Use the functions to calculate the median and mode.)

Explanation / Answer

MeanMedianMode.java

package org.students;

import java.util.Scanner;
import java.util.Arrays;

public class MeanMedianMode {

   public static void main(String[] args) {
       int totMovies=0,length;
       double mean=0;
   Scanner sc=new Scanner(System.in);
   System.out.print("Enter the no of Students data you want to enter::");
   int num=sc.nextInt();
   int stdMovArr[]=new int[num];
   for(int i=0;i<num;i++)
   {
       System.out.print("No of Movies see by Student "+(i+1)+" in a month::" );
       stdMovArr[i]=sc.nextInt();
       totMovies+=stdMovArr[i];
   }
   //Calculating Mean
   mean=totMovies/num;
   System.out.println("The Mean of the Array is::"+mean);
   //Calling Methods
   median(stdMovArr);
   mode(stdMovArr);
  
  
   }
   //Method to Calculate Mode
   private static void mode(int[] stdMovArr) {
      
       int count2 = 0;
       int count1 = 0;
       int pupular1 =0;
       int popular2 =0;

       for (int i = 0; i < stdMovArr.length; i++)
       {
       pupular1 = stdMovArr[i];
       count1 = 0; //see edit

       for (int j = i + 1; j < stdMovArr.length; j++)
       {
       if (pupular1 == stdMovArr[j]) count1++;
       }

       if (count1 > count2)
       {
       popular2 = pupular1;
       count2 = count1;
       }

       else if(count1 == count2)
       {
       popular2 = Math.min(popular2, pupular1);
       }
       }
      
       System.out.println("The Mode of the Array is::"+ popular2);
   }
//Method to calculate Median
   private static void median(int[] stdMovArr) {
       int length=0;
       System.out.println("The Elements in the array before sorting are::");
       for(int i=0;i<stdMovArr.length;i++)
       {
           System.out.print(stdMovArr[i]+" ");
       }
       //To sort the Array in the Ascending order
       Arrays.sort(stdMovArr);
       System.out.println(" ");
       System.out.println("The Elements in the array After sorting are::");
       for(int i=0;i<stdMovArr.length;i++)
       {
           System.out.print(stdMovArr[i]+" ");
       }
       System.out.println(" ");
       length=stdMovArr.length;
       if(length%2==0)
       {
       int val   =length/2;
       System.out.println("The Median is::"+stdMovArr[val-1]+" , "+stdMovArr[val]);
       }
       else
       {
           int val=(length+1)/2;
           System.out.println("The Median is::"+stdMovArr[val-1]);  
       }

      
   }

}

__________________________________________________________________________________________

output:

Enter the no of Students data you want to enter::9
No of Movies see by Student 1 in a month::3
No of Movies see by Student 2 in a month::4
No of Movies see by Student 3 in a month::5
No of Movies see by Student 4 in a month::6
No of Movies see by Student 5 in a month::7
No of Movies see by Student 6 in a month::7
No of Movies see by Student 7 in a month::7
No of Movies see by Student 8 in a month::8
No of Movies see by Student 9 in a month::9
The Mean of the Array is::6.0
The Elements in the array before sorting are::
3 4 5 6 7 7 7 8 9
The Elements in the array After sorting are::
3 4 5 6 7 7 7 8 9
The Median is::7
The Mode of the Array is::7

______________________________________________________________________________________

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