Q1:

The probabilities in the probability function table of a discrete random variable always add up to: 
A. 1 B. 0 C. 0.5 D. 2 
Answer 1:


Q2:

x 
1

2

3

4

P(X = x) 
0.3

0.1

0.4

k

For the probability distribution shown above what is the value of k?

A. 4 B. 0.4 C. 0.3 D. 0.2 
Answer 2:


Q3:

Which of the following cannot be true? 
A. P(A) = 0 B. P(A) = 0.99 C. P(A) = 1 D. P(A) = 1.1 
Answer 3:


Q4:

If the probability distribution function for a discrete random variable is given by P(W = w) = kw for w = 3, 4, 5
what is the value of k?

A. 12 B. 1 C. 1 / 12 D. 0.12 
Answer 4:


Q5:

In the question above, what is P(W = 3) 
A. P(W = 3) = 0 B. P(W = 3) = 0.5 C. P(W = 3) = 0.25 D. P(W = 3) = 0.3 
Answer 5:

