Exam 4: Probability and Counting Rules
Exam 1: The Nature of Probability and Statistics81 Questions
Exam 2: Frequency Distributions and Graphs107 Questions
Exam 3: Data Description127 Questions
Exam 4: Probability and Counting Rules173 Questions
Exam 5: Discrete Probability Distributions117 Questions
Exam 6: The Normal Distribution114 Questions
Exam 7: Confidence Intervals and Sample Size122 Questions
Exam 8: Hypothesis Testing178 Questions
Exam 9: Testing the Difference Between Two Means, Two Variances, and Two Proportions99 Questions
Exam 10: Correlation and Regression73 Questions
Exam 11: Other Chi-Square Tests73 Questions
Exam 12: Analysis of Variance69 Questions
Exam 13: Nonparametric Statistics62 Questions
Exam 14: Sampling and Simulation58 Questions
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Nanette must pass through three doors as she walks from her company's foyer to her office. Each of these doors may be locked or unlocked.
Let B be the event that exactly two doors are locked. List the outcomes of B
Designate "locked" and U" designate "unlocked".]
(Multiple Choice)
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At the campus cafeteria, a diner can purchase a "meal deal" that consists of an entree, a side dish, and a dessert. There are 4 choices for the entree, 3 choices for the side dish,
And 3 choices for dessert. How many different meal deals are possible?
(Multiple Choice)
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If the letters A, B, C, D, E, and F are to be used in a five-letter code, how many different codes are possible if repetitions are not permitted?
(Multiple Choice)
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Given eight students, three of which are female, if two students are selected at
random, without replacement, what is the probability that both students are
female?
(Short Answer)
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A child gets 20 heads out of 30 tosses of a coin. If he declared the chance of
getting a head with that coin were 2/3, that would be an example of
probability.
(Short Answer)
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A business has seven locations to choose from and wishes to rank only the top three locations. How many different ways can this be done?
(Multiple Choice)
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A package contains 10 resistors, 2 of which are defective. If 3 are selected, find the probability of getting 1 defective resistor.
(Multiple Choice)
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What is the set of all possible outcomes of a probability experiment?
(Multiple Choice)
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When 3 dice are rolled, find the probability of getting a sum of 13.
(Multiple Choice)
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If a sportscaster makes an educated guess as to how well a team will do this season, he is using what type of probability?
(Multiple Choice)
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On a recent Saturday, a total of 1086 people visited a local library. Of these people, 269 were under age 10, 466 were aged 10-18, 185 were aged 19-30, and the rest were more than
30 years old.
One person is sampled at random. What is the probability that the person is more than 30 years
Old?
(Multiple Choice)
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What is the correct relationship between events A and B: A: Karl is college graduate.
B: Karl is a high school graduate.
(Multiple Choice)
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A fast-food restaurant chain has 633 outlets in the United States. The following table categorizes them by city population and location and presents the number of outlets in each category. An outlet is chosen at random from the 633 to test market a new menu.
Region Population of city NE SE SW NW Under 50,000 28 30 31 22 50,000-500,000 58 46 54 42 Over 500,000 79 125 74 44
Given that the outlet is located in a city with a population under 50,000 , what is the probability that it is in the Southwest?
(Multiple Choice)
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FizzFizz soda comes in two varieties, regular and diet. If a researcher has 5 boxes of each, how many ways can he select 2 boxes of each for a quality control test?
(Multiple Choice)
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A section of an exam contains two multiple-choice questions, each with three answer choices (listed "A", "B", and "C"). Assuming the outcomes to be equally likely, find the
Probability (as a reduced fraction) that both answers are the same ("AA", "BB" or "CC").
[Hint: List all the outcomes of the sample space first.]
(Multiple Choice)
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Let and be events with , and and . Are and mutually exclusive?
(Multiple Choice)
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If two dice are rolled one time, find the probability of getting a sum of 6.
(Multiple Choice)
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