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Random variables quiz
Five questions on Random variables. Answer all 5 to see your score. Questions are drawn from a bank of 15, so every attempt is different.
Question 1 of 5
Which is a discrete random variable?
Question 2 of 5
A distribution has P(0) = 0.3, P(1) = 0.4, P(2) = k. What is k?
Question 3 of 5
A raffle ticket costs $5 and wins $100 with probability 0.02. What is the expected net gain?
Question 4 of 5
If E(X) = 4, what is E(3X + 2)?
Question 5 of 5
If Var(X) = 4, what is Var(3X + 2)?