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Jointly continuous PDF In order for a function f(x,y)to be a joint density it must satisfy f(x,y)≥0 fir(x.y)dxdy =1 6Jointly continuous PDF • In order for a function 𝑓(𝑥, 𝑦) to be a joint density it must satisfy 𝑓(𝑥, 𝑦) ≥ 0 𝑓𝑋,𝑌 𝑥, 𝑦 𝑑𝑥 ∞ −∞ 𝑑𝑦 ∞ −∞ = 1 6
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