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MeanSDVar
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//g++ 7.4.0 //calculate mean, standard deviation and variance // created by Rezaul Hoque on Dec 17,2020 //contact at jewelmrh@yahoo.com #include <iostream> #include <cmath> using namespace std; int main() { int n=3,sum=0,sum2=0; int a[n]={2,4,8}; float mean, SD, preSD,var; for(int i=0;i<n;i++) { sum += a[i]; } mean = sum/n; for(int i=0; i<n; i++) { sum2 += (a[i]-mean)*(a[i]-mean); } preSD= sum2/n; SD= sqrt(preSD); var = SD*SD; cout<<"Mean:\t"<<mean; cout<<endl; cout<<" Standard Deviation:\t"<<SD; cout<<endl; cout<<"Variance:\t"<<var; return 0; }
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Compilation time: 0.52 sec, absolute running time: 0.17 sec, cpu time: 0.01 sec, memory peak: 5 Mb, absolute service time: 0,77 sec
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Mean: 4 Standard Deviation: 2.44949 Variance: 6