Basic stats

<h1>Stats calculator</h1>
<textarea  id="datas" rows="5" cols="50">1,2,3,4,7,4</textarea>
<br />
<input type="button" onclick="splitdata()" value="Sort shit"/>
<x id="Report"></x>
<script>
//basic analysis of one set of data through various methods
var x;
function splitdata(){
var Zx = document.getElementById("datas").value;
x = Zx.split(",");
var n = x.length;
for(i=0;i<n;i++){
x[i] = Number(x[i]);
}
bubblesort();
//start building the report
var report="<p>The data in ascending order: " + x.join();
report= report + "<br />The sum is: " + sumx() + " The total data points is: " + n + " Thus the mean is: " + sumx()/n;
report = report + "<br />The lower quartile is: " + x[Math.round(n/4)-1] + " The median is: " + median() + " The upper quartile is: " + x[Math.round(3*n/4)-1];
report = report + "<br />The overall range is: " + (x[n-1]-x[0]) + " The interquartile range is: " + (x[Math.round(3*n/4)-1] - x[Math.round(n/4)-1]);
report = report + "<br />The lower outliers are:" + Loutliers() + " The upper outliers are: " + Uoutliers();
report = report + "<br />The mean calculated without outliers is: " + MEAN();
report = report + "<br />The sum of the squares is: " + sumx2();
report = report + "<br />The variance is: " + variance() + " Hence the standard deviation is: " + Math.pow(variance(),0.5);

report = report + "</p>"
document.getElementById("Report").innerHTML = report;
}
function variance(){
var n = x.length;
return sumx2()/n - Math.pow(sumx()/n,2);
}
function sumx2(){
var sum = 0;
for (i=0;i<x.length;i++){
sum = sum + Math.pow(x[i],2);
}
return sum;
}
function MEAN(){
var sum = 0;
var n = 0;
for (i=0;i<x.length;i++){
    if(x[i]>= GetLowQ() && x[i] <= GetUpQ()){
    sum = sum + x[i];
    n++;
    }
}
return sum/n;
}
function Uoutliers(){
var list = "";
for (i=0;i<x.length;i++){
 if(x[i]>GetUpQ()){
 list = list + x[i] + ",";
 }
}
if (list==""){
return "No higher outliers!";
}else{
return list;
}
}
function Loutliers(){
var list = "";
for (i=0;i<x.length;i++){
 if(x[i]<GetLowQ()){
 list = list + x[i] + ",";
 }
}
if (list==""){
return "No lower outliers!";
}else{
return list;
}
}
function GetLowQ(){
var n = x.length;
var rang = 1.5 * (x[Math.round(3*n/4)-1] - x[Math.round(n/4)-1]);
var LB = x[Math.round(n/4)-1] - rang;
return LB;
}
function GetUpQ(){
var n = x.length;
var rang = 1.5 * (x[Math.round(3*n/4)-1] - x[Math.round(n/4)-1]);
var HB = x[Math.round(3*n/4)-1] + rang;
return HB;
}
function median(){
n=x.length;
alert(n % 2);
if (n % 2 == 0){
    return (x[n/2]+x[n/2-1])/2;
}else{
    return x[n/2+0.5];
}
}//end of median
function sumx(){
var sum = 0;
for (i=0;i<x.length;i++){
sum = sum + x[i];
}
return sum;
}
function bubblesort(){
var cat = 0;
while(cat==0){
 cat=1;
 for (i=0;i<(x.length-1);i++){
  if (x[i]>x[i+1]){//if their in the wrong order swap them
   hold=x[i];
   x[i]=x[i+1];
   x[i+1] = hold;
   cat=0;
  }//exit if
 }//exit the for loop
}//exit bubble sort loop
document.getElementById("datas").value = x.join();
}//exit bubble sort function


</script>