docs: function Sample(val, timeStamp, persistObj) {
  	this.min = val;
  	this.max = val;
  	this.sigma = new StandardDeviation(val);
  	this.average = new Average(val);
  	this.timeStamp = timeStamp;
  
  	if (persistObj) {
  		var that = this;
  
  		persistObj.on('reset', function (timeStamp) {
  			that.reset(timeStamp);
  		});
  	}
  }