This question is extending this old question.

I have an array of numbers like this in PHP:

$numbers = [
    1.2,
    3.5,
    3.1,
    3.1,
    8.0,
    9.0
];

In PHP, I am trying to find the outliers in this highest end of this array.

As you can see, the anomalies are then

8.0,
9.0

So i do not want to remove

1.2

The old question finds outliers in both ends of the number series. I am trying to find and remove the positive outliers in any array in PHP.