method to compute the mean (average) of the data in an array takes one parameter, an array of integers returns the mean (average) of the data in the parameter array

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Image one is my file.

image 2 is the program I wrote 

base on my program I want to write a method 3:

A method to compute the mean (average) of the data in an array

    • takes one parameter, an array of integers

    • returns the mean (average) of the data in the parameter array

1 import java.util.*;
2 import java.io.*;
3 public class FunWithHistograms {
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public static void main(String[] args) throws FileNotFoundException {
printIntro();//method 1
Scanner console = new Scanner (System.in);
System.out.print("input file name? ");
String fileName = console.nextLine();
Scanner inFile = new Scanner (new File(fileName));
int[] data = readData(inFile);//method 2
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13 }
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22 public static int[] readData(Scanner inFile) { //method 2
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int numVals = inFile.nextInt ();
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int[] data = new int[numVals];
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34 }
public static void printIntro() {
System.out.println("The program will analyze data from a dataset of");
System.out.println("non-negative
integer values. It will produce a");
System.out.println("histogram of the data and output some statistics.");
System.out.println();
for (int i = 0; i < numVals; i++) {
data[i] = inFile.nextInt ();
}
return data;
//write method 3 plz.
/home/FunWithHistograms.java 32:26 Spaces: 4 (Auto)
Transcribed Image Text:1 import java.util.*; 2 import java.io.*; 3 public class FunWithHistograms { 4 5 6 7 8 public static void main(String[] args) throws FileNotFoundException { printIntro();//method 1 Scanner console = new Scanner (System.in); System.out.print("input file name? "); String fileName = console.nextLine(); Scanner inFile = new Scanner (new File(fileName)); int[] data = readData(inFile);//method 2 9 10 11 12 13 } 14 15 16 17 18 19 20 21 22 public static int[] readData(Scanner inFile) { //method 2 23 int numVals = inFile.nextInt (); 24 int[] data = new int[numVals]; 25 26 27 28 29 30 31 32 33 34 } public static void printIntro() { System.out.println("The program will analyze data from a dataset of"); System.out.println("non-negative integer values. It will produce a"); System.out.println("histogram of the data and output some statistics."); System.out.println(); for (int i = 0; i < numVals; i++) { data[i] = inFile.nextInt (); } return data; //write method 3 plz. /home/FunWithHistograms.java 32:26 Spaces: 4 (Auto)
world_cup_goals_20...
seattle_average_te...
1 29//totol value in this file.
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pril 2019.txt 1:1 Spaces: 4 (Auto)
disneyland_rati... X
FunWith Histograms...
All changes saved
Run
✓ Mark
Transcribed Image Text:world_cup_goals_20... seattle_average_te... 1 29//totol value in this file. 25 35 45 55 65 7 3 85 95 10 5 11 3 12 5 13 5 14 5 15 4 16 5 17 2 18 5 19 5 20 5 21 5 22 4 23 5 24 5 25 5 26 5 27 5 28 4 29 5 30 5 pril 2019.txt 1:1 Spaces: 4 (Auto) disneyland_rati... X FunWith Histograms... All changes saved Run ✓ Mark
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