/*write a c program to input N real numbers and to find mean,variance
and standard deviation */
#include<stdio.h>
#include<math.h>
void main()
{
float a[15],avg,var,std,sum,sqsum;
int i,n;
printf("\n Enter the n size of the array");
scanf("%d",&n);
printf("\nEnter the array:");
for(i=0;i<n;i++)
scanf("%f",&a[i]);
sum=0;
for(i=0;i<n;i++)
sum=sum+a[i];
avg=sum/n;
sqsum=0;
for(i=0;i<n;i++)
sqsum=sqsum+(a[i]-avg)*(a[i]-avg);
var=sqsum/n;
std=sqrt(var);
printf("\n Mean=%f",avg);
printf("\n Variance=%f",var);
printf("\n standard deviation=%f",std);
return 0;
}