Code://Here is what I got so far
#include <iostream>
using namespace std;
int main ()
{
int n, median;
double standarddeviation;
int num [31]={12, 13, 15, 16, 18, 19, 21, 34, 57, 32, 38, 213, 10, 14, 156, 172, 134, 143, 132, 139, 751, 30, 31, 81, 23, 41, 24, 51, 75, 91, 1234};
int sum= 0;
for (n=0; n<31; n++)
sum = sum+num [n];
double average=sum/31.0;
standarddeviation=(num[n]-average)*(num[n]-average);//I want to multiply every number by itself, subtract from the mean and son on but I can't seem to get it
cout<< sum<<endl;
cout<<average<<endl;
cout<<standarddeviation;
return 0;
}