private function getMedianScore()
{
$arr = $this->scores;
sort($arr);
$count = count($arr);
$middleval = floor(($count - 1) / 2);
if ($count % 2) {
$median = $arr[$middleval];
} else {
$low = $arr[$middleval];
$high = $arr[$middleval + 1];
$median = ($low + $high) / 2;
}
return $median;
}