Exam 5: A Survey of Probability Concepts

A company's managers evaluated their employees into three classes: excellent performance, good performance, and poor performance. The following is a frequency distribution of the results. What is the probability that a randomly selected employee was rated excellent or good?

In a finance class, the final grade is based on three tests. Historically, the instructor tells the class that the joint probability of scoring "A"'s on the first two tests is 0.5. A student assigns a probability of 0.9 that she will get an "A" on the first test. What is the probability that the student will score an "A" on the second test given that she scored an "A" on the first test?

A study of interior designers' opinions with respect to the most desirable primary color for executive offices showed the following: What is the probability that a designer does not prefer red?

If a set of outcomes is collectively exhaustive and mutually exclusive, the sum of the probabilities equals __________.

The first card selected from a standard 52-card deck was a king. If it is returned to the deck, what is the probability that a king will be drawn on the second selection?

Each salesperson in a large department store chain is rated on their sales ability and their potential for advancement. The data for the 500 sampled salespeople are summarized in the following table. What is the probability that a salesperson selected at random will have average sales ability and good potential for advancement?

To apply the special rule of addition, the events must be mutually exclusive.

Complete the following analogy: An experiment relates to outcome, as the role of a die relates to _____.

In a survey of employee satisfaction, the following table summarizes the results in terms of employee satisfaction and gender. What is the probability that an employee is satisfied, given that the employee is male?

An individual can assign a subjective probability to an event based on the individual's knowledge about the event.

Your favorite soccer team has two remaining matches to complete the season. The possible outcomes of a soccer match are win, lose, or tie. What is the possible number of outcomes for the season?

The probability of rolling a 3 or 2 on a single die is an example of mutually exclusive events.

A study by the National Park Service revealed that 50% of the vacationers going to the Rocky Mountain region visit Yellowstone Park, 40% visit the Grand Tetons, and 35% visit both. What is the probability that a vacationer will visit at least one of these magnificent attractions?

In a management trainee program, 80% of the trainees are female, while 20% are male. Ninety percent of the females attended college; 78% of the males attended college. A management trainee is selected at random. What is the probability that the person selected is a female who attended college?

The probability of selecting a professor who is male and has a master's degree is called a ______________.

A measured or observed activity is called a(n) ___________.

The probability that a one, two, or six will appear face up on the throw of one die is _____.

Compare and contrast the classical, empirical, and subjective approaches to assigning probabilities.

A company set up a kiosk in the Mall of America for several hours and asked randomly selected people which color cell phone was their favorite. The results follow: What is the probability that a person would select orange or lime as their favorite color?

The probability of an event that is affected by two or more different events is called a(n) ___________.