GEOMETRIC MEAN for discrete frequency distribution.

# Statistics with C++

//program to calculate the GEOMETRIC MEAN for given discreate frequency distribution.

#include<iostream.h>
#include<iomanip.h>
#include<conio.h>
#include<math.h>
const SZ=100;
class GMean
{
  public : float X[SZ],F[SZ],FLX[SZ];
  float Tn,sf,sflx,gm,t;
  public : void getdata();
  void showdata();
  void gmean();
};

void GMean :: getdata()
{
  cout<<"\nEnter total number of your data : ";
  cin>>Tn;
  cout<<"\nEnter your data  : \n\n";
  for(int i=0;i<Tn;i++)
  {
    cout<<" X "<<i+1<<" : ";
    cin>>X[i];
  }
  cout<<"\nEnter frequencies for above data : \n\n";

  for(int j=0;j<Tn;j++)
  {
    cout<<"Frequency for "<<X[j]<<" : ";
    cin>>F[j];
  }
}

void GMean :: gmean()
{
   sf=0;
   for(int i=0;i<Tn;i++)
   {
     FLX[i] =F[i] * (log10 (X[i]));
     sflx+=FLX[i];
     sf+=F[i];
   }
   t= (sflx/(double)sf);
   gm= pow(10,t);
}

void GMean :: showdata()
{

   cout<<"\n\n*** YOUR DATA IS AS FOLLOWS: ***\n\n";
   cout<<"\n\n  X  \t F \t logX \t F*logX\n ";
   for(int i=0;i<Tn;i++)
   { cout<<X[i]<<"\t"<<F[i]<<"\t"<<setprecision(3)<<log10(X[i])<<"\t"<<FLX[i]<<" \n "; }

  // cout<<"\n\nNumber of observations = "<<Tn;
  // cout<<"\nSummation of Freq.*logX = "<<sflx;
  // cout<<"\n\n"<<t;
   cout<<"\n\nGeometric mean for your data = "<<gm;

}

void main()
{
  GMean GM;
  clrscr();
  GM.getdata();
  GM.gmean();
  GM.showdata();
  getch();

}

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Out Put :

Enter total number of your data :  9

Enter your Data :

    X1 :   130

    X2 :   135

    X3 :   140

    X4 :   145

    X5 :   146

    X6 :   148

    X7 :   149

    X8 :   150

    X9 :   157

Enter frequencies for above data : 

 Frequency for 130 :  3

 Frequency for 135 :  4

 Frequency for 140 :  6

 Frequency for 145 :  6

 Frequency for 146 :  3

 Frequency for 148 :  5

 Frequency for 149 :  2

 Frequency for 150 :  1

 Frequency for 157 :  1

*** YOUR DATA IS AS FOLLOWS: ***

  X      F       logX    F*logX

 130    3       2.114   6.342

 135    4       2.13    8.521

 140    6       2.146   12.877

 145    6       2.161   12.968

 146    3       2.164   6.493

 148    5       2.17    10.851

 149    2       2.173   4.346

 150    1       2.176   2.176

 157    1       2.196   2.196

Geometric mean for your data = 142.528

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* please comment if there is any error or if it need corrections.

Happy Coding!