Practica 9 Visual

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 practica_9._1windows
{
public partial class Form1 : Form
{
int[] calificacion;
int[]desviacion;
int suma,promedio,i,variansa;
public Form1()
{
InitializeComponent();
calificacion = new[] { 89, 95, 72, 83, 99, 54, 86, 75, 92, 73, 79, 75, 82, 73 };
desviacion=new int [14];
i=suma=promedio=variansa=0;


}

private void button1_Click(object sender, EventArgs e)
{
listBox1.Items.Add("calificacion desviacion");
for (i = 0; i < 14; i++)
{
suma = suma + calificacion[i];
}
promedio = suma / 14;
for (i = 0; i < 14; i++)
{
desviacion[i]=calificacion[i]-promedio;
listBox1.Items.Add(calificacion[i]+" "+desviacion[i]);
}
suma = 0;
for (i = 0; i < 14; i++)
{
suma = suma + desviacion[i] * desviacion[i];
}
variansa = suma / 14;
listBox1.Items.Add("la variansa es"+variansa);

}
}
}