[WIP] Compute mean and median with outlier detection

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

Original prompt

suppose an dataset like
x={7,8,4,5,16,20,24,19,30,23,30,25,19,29,29,30,30,40,56}
so to this compute the mean and median for this and is there any outlier existis ? if so how ?
with this data what centeral tendency i can come up with like to choose the mean or median ?

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