/* 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();
}