Exam 5: A Survey of Probability Concepts

When the special rule of multiplication is used, the events must be _______________.

Using the terminology of Bayes' Theorem, a posterior probability can also be defined as:

A study of 200 computer service firms revealed these incomes after taxes: What is the probability that a particular firm selected has $1 million or more in income after taxes?

In a management trainee program, 80 percent of the trainees are female, 20 percent male. Ninety percent of the females attended college, 78 percent of the males attended college. A management trainee is selected at random. What is the probability that the person selected is a female who did NOT attend college?

Which approach to probability is exemplified by the following formula? Probability of an Event =

An automatic machine inserts mixed vegetables into a plastic bag. Past experience revealed that some packages were underweight and some were overweight, but most of them had satisfactory weight. What is the probability of selecting three packages that are satisfactory?

When applying the special rule of addition for mutually exclusive events, the joint probability is:

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?

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?

What is a measured or observed activity called? _________________

A group of employees of Unique Services will be surveyed about a new pension plan. In-depth interviews with each employee selected in the sample will be conducted. The employees are classified as follows. What is the probability that the first person selected is either in management or in supervision?

The National Center for Health Statistics reported that of every 883 deaths in recent years, 24 resulted from an automobile accident, 182 from cancer and 333 from heart disease. What is the probability that a particular death is due to an automobile accident?

If two events are mutually exclusive, then P(A or B) = P(A) P(B).

When an experiment is conducted "without replacement,"

The numbers 0 through 9 are used in code groups of four to identify an item of clothing. Code 1083 might identify a blue blouse, size medium. The code group 2031 might identify a pair of pants, size 18, and so on. Repetitions of numbers are not permitted, i.e., the same number cannot be used more than once in a total sequence. As examples, 2256, 2562 or 5559 would not be permitted. How many different code groups can be designed?

A group of employees of Unique Services will be surveyed about a new pension plan. In-depth interviews with each employee selected in the sample will be conducted. The employees are classified as follows. What is the probability that the first person selected is either in maintenance or in secretarial?

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

In flipping a fair coin, what is the probability of a head and a tail on two tosses?

If a set of events are collectively exhaustive and mutually exclusive, what does the sum of the probabilities equal? ___

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?