1. Suppose you roll two dice, and let X be sum of the dice. Then X is
A continuous random variable
A discrete random variable
A discreet random variable
Both
Neither

2. A continuous random variable can take any value between zero and one.
True
False

3. Let the random variable X be a random number with the uniform density curve given below. P (0.7 < X < 1.1) has value
0.30
0.40
0.70

4. Let X be a standard normal random variable
Let X be a standard normal random variable. Which of the following probabilities is the smallest?
P(-2<X<-1)
P(0<X<2)
P(X<1)
P(X>2)

5. Consider the following probability histogram for a discrete random variable X. What is P(X < 3)?
0.10
0.25
0.35
0.65

6. Answers
B, B, A (there is no area from 1 to 1.1), D, C