Let X be a discrete random variable with PMF pX(1)=a, pX(2)=b, pX(3)=c, pX(4)=0.3, and 0 otherwise. Its CDF is FX(x)=0 for x<1, 0.2 for 1≤x<2, 0.6 for 2≤x<3, 0.7 for 3≤x<4, and d for x≥4. Evaluate a+b+c+d.
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Q43
5 Jun 2022
Statistics 2 · Week 1
Q43.Let X be a discrete random variable with PMF pX(1)=a, pX(2)=b, pX(3)=c, pX(4)=0.3, and 0 otherwise. Its CDF is FX(x)=0 for x<1, 0.2 for 1≤x<2, 0.6 for 2≤x<3, 0.7 for 3≤x<4, and d for x≥4. Evaluate a+b+c+d.
