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[HELP] Maximum Likelihood

Hello, Can someone please explain the maximum likelihood for theta by using its function pl. I am not able to understand it at all.

Can you share the source you are using to learn the topic? Context from the source might help.

Also what’s “function pl”?

Note: I am not too familiar with the topic, as of now. So, it would take me some time to respond back (or, of course, anyone else can help out in the meantime)

The function for the probability density of normal distribution. Processing: Unknown…
Processing: The-Normal-Distribution_1.png.webp…
Screenshot 2021-09-30 at 2.03.35 AM

This is the function I am unable to understand. Also is it possible to help with it’s derivation in order to get deep understanding of the same.