Joint Probability Distribution Function Assignment Help
let (X, Y) be a two dimensional random variable then their joint distribution function is denoted by FXY (X,Y) and it represents the probability that simultaneously the observation (X,Y) will have the property (X ≤ x and Y ≤ y) that is
FXY (X,Y) = P( -∞ <X ≤ x, -∞ < Y ≤ y)
Where
And
Properties of joint distribution function:
- 1. for the real numbers a1, b1, a2 and b2
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P(a1 < X ≤ b1, a2 < X ≤ b2) = FXY (b1, b2) + FXY (a1, a2) - FXY (a1, b2) - FXY (b1, a2)
- 2. F (-∞, y) = 0 = F(x, +∞), F(-∞,+∞) =1
- 3. If the density function is continuous at (x,y) then
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