# Statistics With C++
#include<iostream.h>
#include<iomanip.h>
#include<conio.h>
const SZ=100;
class Median
{
public : int F[SZ],LCF[SZ],LM[SZ],UL[SZ];
int N,Tn,h;
public : void mdData();
void mdShow();
void mdMedian();
};
void Median :: mdData()
{
cout<<"\nEnter total no. data : ";
cin>>Tn;
cout<<"\n\nEnter lower and upper limit of class: (ex. 0 10) : \n";
for(int i=0;i<Tn;i++)
{
cout<<"\n Class Number"<<i+1<<" : ";
cin>>LM[i];
cin>>UL[i];
}
cout<<"\n\nEnter frequency for entered classes : \n";
for(i=0;i<Tn;i++)
{
cout<<"\n Freq. for class "<<LM[i]<<"-"<<UL[i]<<" : ";
cin>>F[i];
LCF[i] = F[i];
}
for(i=1;i<Tn;i++)
{
LCF[i]=LCF[i-1]+LCF[i];
}
}
void Median :: mdShow()
{
cout<<"\n\nYour Data : \n\n";
cout<<"\nTotalNumbr of Data : "<<Tn;
cout<<"\n\n Class \t Frequency\t less than c. freq.\n";
for(int i=0;i<Tn;i++)
cout<<"\n "<<LM[i]<<"-"<<UL[i]<<"\t\t"<<F[i]<<"\t\t"<<LCF[i];
}
void Median :: mdMedian()
{
int c,d,l,u,f,i=0;
N=LCF[Tn-1];
float mdc=(float)N/2;
while(i<Tn)
{
if(LCF[i]>mdc)
{
d=LCF[i];
c=LCF[i-1];
f=F[i];
l=LM[i];
u=UL[i];
h=u-l;
break;
}
i++;
}
cout<<"\n\n";
/*
cout<<"\nClass Interval (i.e h) = "<<h;
cout<<"\nSum of all Freq.s (i.e N) = "<<N;
cout<<"\nTo find median class (N/2) = "<<mdc;
cout<<"\nFrequency of median class (f)= "<<f;
cout<<"\nLower limit of median class (l)= "<<l;
cout<<"\nUpper limit of median class (u)= "<<u;
cout<<"\nLess-than-cf just before the ltcf of median class (i.e C) = "<<c;
*/
cout<<"\n\nMedian Class : \n\n";
cout<<"-----------------------------------\n";
cout<<" Class \t Frequency \t Less than CF.\n";
cout<<"\n "<<l<<"-"<<u<<"\t\t"<<f<<"\t\t "<<d ;
cout<<"\n------------------------------------\n";
float MeDian =(float) l+((h*(mdc-c)/f));
cout<<"\n\nMedian for you Data = "<<setprecision(2)<<MeDian<<"\n";
}
void main()
{
Median MD;
clrscr();
MD.mdData();
MD.mdShow();
MD.mdMedian();
getche();
}
---------------------------------------------------------------------------------------------------------------------
Out Put :
Enter total no. of Data : 7
Enter lower and upper limit of class: (ex. 0 10) :
Class Number1 : 0 3
Class Number2 : 3 6
Class Number3 : 6 9
Class Number4 : 9 12
Class Number5 : 12 15
Class Number6 : 15 18
Class Number1 : 18 21
Enter frequencies for entered classes :
Freq. for class 0-3 : 2
Freq. for class 3-6 : 7
Freq. for class 6-9 : 10
Freq. for class 9-12 : 12
Freq. for class 12-15 : 9
Freq. for class 15-18 : 6
Freq. for class 18-21 : 4
Please comment if you find any error or Corrections...
Happy Coding!
