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# Objective questions - Probability theory

Indicate whether the sentence or statement is true or false.

T 1. Deterministic techniques assume that no uncertainty exists in model parameters.

F 2. The probabilities of mutually exclusive events sum to zero.

T 3. A joint probability is the probability that two or more events that are not mutually exclusive can occur simultaneously.

T 4. For a continuous distribution involving a continuous random variable X, P(X <= 100) = P(X < 100).

F 5. Deterministic techniques include uncertainty and assume that there can be more than one model solution.

Multiple Choice

Identify the letter of the choice that best completes the statement or answers the question.

C 6. ____________ techniques assume that no uncertainty exists in model parameters

a. Probability

b. Probabilistic

c. Deterministic

d. Distribution

A 7. The events in an experiment are _____________ if only one can occur at a time

a. mutually exclusive

b. non-mutually exclusive

c. mutually inclusive

d. independent

C 8. P(A U B) is the probability that __________ will occur

a. A

b. B

c. A and B

d. A or B or both

_____ 9. For the normal distribution, the mean plus and minus 1.96 standard deviations will include what percent of the observations?

a. 80%

b. 84%

c. 90%

d. 95%

_____ 10. A loaf of bread is normally distributed with a mean of 22 oz and a standard deviation of 0.5 oz. What is the probability that a loaf is more than 22.75 oz?

a. 0.0668

b. 0.1587

c. 0.3413

d. 0.4332

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