checkpoint6.5.cpp

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#include <iostream>
using namespace std;
 
int main(){
    int length;
    cin >> length;
    double a[15];
    for (int i = 0; i < length; i++){
        cin >> a[i];
    }
    double mean, variance = 0;
    for (int i = 0; i < length; i++){
        mean += a[i];
    }
    mean /= length;
    for (int i = 0; i < length; i++){
        variance += (a[i] - mean) * (a[i] - mean);
    }
    variance /= length;
    cout << "Variance = " << variance;
}