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How can i tell if a single distribution is symmetric and if a joint distribution is symmetric ? In photo 1, i assume its symmetric
How can i tell if a single distribution is symmetric and if a joint distribution is symmetric?
In photo 1, i assume its symmetric because substituting -r and r gives the same f(r). Is this the correct way?
In photo 2, its a joint distribution of R1 and R2 but i do not know why are P(R1 -R2>1) and P(R2 - R1>1) symmetric. Please advice! Thank you.
Photo 1
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