Question: 2.4. (Sec. 2.2) Let F(x l , x2 ) be the joint cJf of Xl' X 2, and let Fj(x) be the marginal cdf of

2.4. (Sec. 2.2) Let F(x l , x2 ) be the joint cJf of Xl' X 2, and let Fj(x) be the marginal cdf of Xi' i = 1,2. Prove that if f~(x) is continuous, i = 1,2, then F(x I, t2) is continuous.

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