STATISTICS AND PROBABILITY

1. What must be the value of the probability of each random variable?

• A. P(X) ≥ 0

• B. 0≤ P(X) ≤ 1

• C. -1≤ P(X) ≤ 1

• D. P(X) ≤ 1

2. What is the sum of the probabilities of all values of the random

variable?

• A. Σ 𝑃(𝑋))= 0

• B. Σ 𝑃(𝑋)) = 1/10

• C. Σ 𝑃(𝑋)) = 1

• D. Σ 𝑃(𝑋)) = 10

3. Which of the following values is not the value of the probability of the

random variable?

• A. 1.01

• B.1

• C.0.50

• D. 0.05

4. Which of the following values can serve as the values of a probability

distribution?

• A. P(1) = 0.42, P2) = 0.31, P(3 )= 0.37

• B. P(1) = 9/14, P2) = 4/14, P(3) = 1/14

• C. P(1) = 0.08, P2) = 0.12, P(3 )= 1.03

• D. P(1) = 10/33, P2) = 12/33, P(3) = 10/33

• A.0,2,3

• B. 1,1,2

• C. 2,3,4

• D. 1,2,3