Attached is a text file containing abbreviations for the months of the year and

Question

Attached is a text file containing abbreviations for the months of the year and the projected sales in each month for a new model of motorcycle. ABC Motorcycle Company in Chicago is launching this new motorcycle in January 2017. They have hired you as a consultant.

Read the text file into your program when the program begins and store the information in parallel arrays. Create a function to calculate the mean and another one to calculate the standard deviation.

Create a subroutine that will display on the user interface (not a message box) the mean, standard deviation, month(s) with the highest expected sales and the lowest expected sales (along with the sales projection).

Create your user interface so that the user may change the projected sales for any month and recalculate/redisplay the information in the paragraph above.

Write a memo to ABC Company (2 page limit) explaining your interpretation of the original monthly projections.

Turn in a hard copy of your algorithm, vb code file, and memo. Submit all of these plus your .exe file

This is using microsoft visual studio.

Explanation / Answer

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace CalculateData
{
public partial class DataCalculator : Form
{
List<double> data;

public DataCalculator()
{
InitializeComponent();
}

private void loadData(object sender, EventArgs e)
{
data = new List<double>();
           System.IO.StreamReader file =
           new System.IO.StreamReader("data.txt");
           while((line = file.ReadLine()) != null)
           {
           String temp = line.split(" ");
           data.add(Double.parseDouble(temp[1]);
           }

           file.Close();
}

void displayData()
{
lbxValues.Items.Clear();

for (int i = 0; i < data.Count; i++)
lbxValues.Items.Add(data[i]);
}
       private void btnAdd_Click(object sender, EventArgs e)
       {
           // calculating values and adding to GUI
           double value = 0.00;
           double sumForMean = 0.00, totalSum = 0.00, mean = 0.00;
           double standardDeviation = 0.00;

           // check for user entered empty string
           if (txtValue.Text.Length == 0)
           {
               MessageBox.Show("Emoty value", "Standard Deviation");
               return;
           }

           try
           {
               // fetching user entered value
               value = double.Parse(txtValue.Text);
               data.Add(value);
               displayData();

               txtValue.Text = "";
               txtValue.Focus();
           }
           catch (FormatException)
           {
               MessageBox.Show("invalid entry.",
                               "Standard Deviation");
           }

           // sum to mean
           for (int i = 0; i < data.Count; i++)
               sumForMean += data[i];
           // Calculate mean
           mean = sumForMean / data.Count;

           // total for standard deviation
           for (int i = 0; i < data.Count; i++)
               totalSum += Math.Pow(data[i] - mean, 2);

           // Calculate standard deviation
           standardDeviation = Math.Sqrt(totalSum / (data.Count - 1));

           // Display data
           txtCount.Text = data.Count.ToString();
           txtSum.Text = sumForMean.ToString("F");
           txtMean.Text = mean.ToString("F");
           txtStandardDeviation.Text = standardDeviation.ToString("F");
       }
       private void btnClear_Click(object sender, EventArgs e)
       {
           data.Clear();
           lbxValues.Items.Clear();

           txtValue.Text = "";
           txtCount.Text = "";
           txtSum.Text = "";
           txtMean.Text = "";
           txtStandardDeviation.Text = "";
           txtValue.Focus();
       }
       private void btnClose_Click(object sender, EventArgs e)
       {
           Close();
       }
}
}

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