/* 15(b). W.A.P. to accept n real numbers & find average, variance and standard deviation */

#include<stdio.h>
#include<math.h>
void main()
{
    int i,n,a[100];
    float mean,value,sum=0.0,var=0.0,sd;
    clrscr();
    printf("\nEnter a number : ");
    scanf("%d",&n);
    printf("\nEnter %d elements below :\n",n);
    for( i=0;i<n;i++ )
    {
        printf("\nNumber %d = ?",i+1);
        scanf("%d",&a[i]);
        sum += a[i];
    }
    mean = sum / (float)n;
    for( i=0;i<n;i++ )
    {
        value = a[i] - mean;
        var += value * value;
    }
    var /= n;
    sd = sqrt( var );
    printf("\nMean = %f",mean);
    printf("\nVariance = %f",var);
    printf("\nStandard Deviation = %f",sd);
    getch();
}