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Exam 5: A Survey of Probability Concepts

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Question 21

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A gumball machine has just been filled with 50 black, 150 white, 100 red and 100 yellow gum balls that have been thoroughly mixed. Sue and Jim, each, purchased one gumball. What is the likelihood both Sue and Jim get red gumballs?

A) 0.50
B) 0.062
C) 0.33
D) 0.75

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Question 22

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A joint probability measures the likelihood that two or more events will happen concurrently.

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Question 23

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

A combination of a set of objects is defined by the order of the objects.

In a probability problem with joint probabilities, the sum of all the joint probabilities must equal _______________.

The result of a particular experiment is called a(n)

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

The probability of two or more events occurring concurrently is called a(n)

Dice are used in a variety of games. A die is a six sided cube with a number of dots on each side. The number of dots ranges from one to six. If two die are used on a game, how many outcomes are possible?

The joint probability of two dependent events, P (A and B), is computed as _______________.

What is a collection of one or more basic outcomes called? __________

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

In flipping a fair coin, what is the probability of either a head or a tail on one toss?

Airlines monitor the causes of flights arriving late. 75% of flights are late because of weather, 35% of flights are late because of ground operations. 15% of flights are late because of weather and ground operations. What is the probability that a flight arrives late because of weather or ground operations?

An illustration of an experiment is turning the ignition key of an automobile as it comes off the assembly line to determine whether or not the engine will start.

The joint probability of two events, A and B, that are not independent is computed as: P(A and B) = P(A) P(B|A).

To apply the special rule of addition, what must be true about the events? __________

Three defective electric toothbrushes were accidentally shipped to a drugstore by the manufacturer along with 17 non-defective ones. What is the probability that the first two electric toothbrushes sold will be returned to the drugstore because they are defective?

A tire manufacturer advertises, "the median life of our new all-season radial tire is 50,000 miles. An immediate adjustment will be made on any tire that does not last 50,000 miles." You purchased four of these tires. What is the probability that all four tires will wear out before traveling 50,000 miles?

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