(C++) CPP Programs - 16

16. Write a C program to input n real numbers and to find Mean, Variance and Standard deviation,

where Mean=( x[i] ) / n, Variance = ∑ ( x[i] – Mean ) 2 /n, Standard deviation = √(Variance) for 1<=i<=n. Output the computed results on different lines.

/*Program to find mean,std_dev,variance*/

#include

#include

#include

void main()

{

float x[45],nr=0.0,std_dev,var,mean,sum=0.0;

int n,i;

clrscr();

printf("Enter how many elements?\n\a");

scanf("%d",&n);

printf("Enter the numbers one by one\n\a");

for(i=0;i <>

scanf("%f",&x[i]);

for(i=0;i <>

sum+=x[i];

mean=sum/n;

for(i=0;i <>

nr+=pow((x[i]-mean),2);

var=nr/n;

std_dev=sqrt(var);

printf("Mean of all elements=%f\n",mean);

printf("Standard deviation of elements=%f\n",std_dev);

printf("Variance=%f\n",var);

getch();

}