#include <iostream>
#include <string>
#include <utility>
#include <vector>
#include <cmath>

using namespace std;

class sample {
	// the container holding all the samples
	vector<double> samples;
	
public:
	// constructors
	sample() {}
	sample(const vector<double>& vd) : samples(vd) {}
	
	// member functions
	int size();
	
	double at(int n); 
	
	const vector<double> &getdata();
	
	void set_data(const vector<double> &v);
	
	double minimum();
	
	double maximum();
	
	double range();
	
	double midrange(); 
	
	double mean();
	
	double variance();
	
	double std_deviation();
	
	double median();
	
	double sum_elements();
	
};