Chapter 4: Introduction to Probability

The set of all possible sample points (experimental outcomes) is called
1. a sample
2. an event
3. the sample space
4. none of the above
A method of assigning probabilities which assumes that the experimental outcomes are equally likely is referred to as the
1. objective method
2. classical method
3. subjective method
4. none of the above
A method of assigning probabilities based on historical data is called the
1. classical method
2. subjective method
3. relative frequency method
4. none of the above
The probability assigned to each experimental outcome must be
1. any value larger than zero
2. smaller than zero
3. at least one
4. between zero and one
If two events are mutually exclusive, then their intersection probability
1. will always be zero
2. can have any value larger than zero
3. must be larger than zero, but less than one
4. none of the choices are correct
The union of events A and B is
1. the same as the intersection of events A and B
2. always equal to zero
3. that event which contains all sample points belonging to A and B
4. that event which contains all sample points belonging to A or B or both
Given that an event E has a probability of 0.25, then the probability of the complement of event E
1. cannot be determined with the above information
2. can have any value between zero and one
3. must be 0.75
4. none of the above
Two events X and Y are independent if
1. P(Y|X) = P(X)
2. P(Y|X) = P(Y)
3. both a and b are satisfied
4. none of the above
Of five letters (A, B, C, D, and E), two letters are to be selected at random. How many possible selections are there?
1. 20
2. 7
3. 5
4. 10
5. none of the above
An experiment consists of three steps. There are three possible outcomes on the first step, four possible outcomes on the second step, and five possible outcomes on the third step. The total number of experimental outcomes is
1. (3!)(4!)(5!)
2. 60
3. 20
4. 10
5. none of the above

Chapter 4: Introduction to Probability

Quiz