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maths statistics help

I am fine with hypothesis testing which is easy, but Im horrible at finding critical regions, can anyone help?
I've tried searching it up on YouTube and asking teachers help but i dont understand their trial and error method.
have you tried looking at examples in the textbook? or any other textbook?
Reply 2
Original post by anonymous34444
have you tried looking at examples in the textbook? or any other textbook?

yea i have a maths textbook

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