<script> 
  var i,N,ort,std,varyans,t1,t2,n1; 
  N=Number(prompt("Bir Sayı Giriniz")); 
  var x = new Array(N) 
  i=1; t1=0; t2=0; n1=0; 
  for(i=1;i<=N;i++) 
  	{ 
  		x[i]=i 
  	} 
  for(i=1;i<=N;i++) 
  	{ 
  	if(x[i]%2==0) 
  		{ 
  		t1=t1+x[i] 
  		t2=t2+Math.pow(x[i],2) 
  		n1=n1+1 
  		} 
  	} 
  ort=t1/n1; 
  varyans=(t2-Math.pow(ort,2)/n1)/(n1-1) 
  std=Math.sqrt(varyans) 
  document.write("<p>ort=" + ort+"</p>") 
  document.write("<p>varyans="+varyans+"</p>") 
  document.write("<p>standart sapma="+std+"</p>")