test.js

var l = [1, 22, 123, 121, 11, 23, 1223, 11,43 ,12, 123, 142, 11, 2333, 121, 123];
document.body.innerHTML+='Input: '+l+'<br>';
document.body.innerHTML+='Output: '+tietjenMooreTest(l, 2);

Tietjen-Moore Test.js

function _avg(x){
	return x.reduce((a,b) => a+b,0)/x.length;
}

function _avgK(x, k){
	var N = x.length;
  var Nk = N-k;
	return x.slice(0, Nk).reduce((a,b) => a+b,0)/Nk;
}

function tietjenMooreTest(X, K){
	var Xs = X.slice(0,X.length).sort((a,b)=>a-b);
	var avg = _avg(Xs);
  var avgK = _avgK(Xs,K);
  var N = X.length;
  var dist = tietjenMooreDistribution(N,K);
  var Nk = N-K;
 
  var passed = Xs.filter(x => {
    return Math.pow(x-avgK,2)/Math.pow(x-avg,2) < dist;
  });
  
  return X.filter(x => passed.indexOf(x) !== -1);
}

function tietjenMooreDistribution(N,K){
	var A,B;
  switch(K){
  	case 1: A=0.19418112; B=-0.06575383; break;
  	case 2: A=0.25812829; B=0.28278038; break;
  	case 3: A=0.29275863; B=0.49380456; break;
  	case 4: A=0.31458311; B=0.63943566; break;
  	case 5: A=0.3245631; B=0.73176359; break;
  	case 6: A=0.33029662; B=0.79975254; break;
  	case 7: A=0.32887508; B=0.83561828; break;
  	case 8: A=0.32971362; B=0.87499117; break;
  	case 9: A=0.32553272; B=0.89145385; break;
    default: A=0.31999176; B=0.89985535;
  }
return A * Math.log(N) - B
}