When sampling is done without replacement and the outcomes are measured as either a
success or failure, the hypergeometric distribution should be applied.
Answer: True
20. A Poisson distribution is a discrete probability distribution. It has the same four
Which shape describes a Poisson distribution?
A) Positively skewed
B) Negatively skewed
C) Symmetrical
D) All of the above
Answer: A
52. Sponsors of a local charity decided to attract wealthy patrons to its $500-a-plate
dinner by allowing each patron to b
Which one of the following is NOT a condition of the binomial distribution?
A) Independent trials
B) Only two outcomes
C) Probability of success remains constant from trial to trial
D) At least 10 observations
Answer: D
50. Which is true for a binomial di
Which of the following is a requirement for use of the hypergeometric distribution?
A) Only 2 possible outcomes
B) Trials are independent
C) Probability of a success is greater than 1.0
D) All of the above
Answer: A
48. What is a listing of all possible o
Which of the following is NOT a characteristic of a binomial probability distribution?
A) Each outcome is mutually exclusive
B) Each trial is independent
C) Probability of success remains constant from trial to trial
D) Each outcome results from two trial
Which of the following is correct about a probability distribution?
A) Sum of all possible outcomes must equal 1
B) Outcomes must be mutually exclusive
C) Probability of each outcome must be between 0 and 1 inclusive
D) All of the above
Answer: D
55. The
What type of population consists of a fixed number of individuals, objects, or measurements?
_
Answer: finite
74. A probability distribution is a listing of the expected outcomes of an experiment
and the probability of each outcome occurring. What is the
What is the probability that no woman is selected?
A) 1/5
B) 1/3
C) 2/15
D) 8/15
Answer: B
101. What is the probability that at least one woman is selected?
A) 8/15
B) 3/5
C) 2/3
D) 3/4
Answer: C
Difficulty: Hard
Goal: 5
Fill-in-the-Blank
102. What is the
What must you know to develop a binomial probability distribution?
A) Probability of success
B) Number of trials
C) Number of successes
D) "a" and "b" only
E) "a" and "c" only
Answer: D
70. In a Poisson distribution the mean is equal to
A) n
B)
C) e - x.
Which is true for a binomial distribution?
A) There are three or more possible outcomes
B) Probability of success remains the same from trial to trial
C) Value of p is equal to 1.50
D) All of the above are correct
Answer: B
51. Which shape describes a Poi
What kind of distribution are the binomial and Poisson distributions?
A) Discrete
B) Continuous
C) Both discrete and continuous
D) Neither discrete or continuous
Answer: A
54. Which of the following is correct about a probability distribution?
A) Sum of a
What is the probability that more than ten and less than fifteen customers pay in cash?
A) 0.541
B) 0.401
C) 0.380
D) 0.562
Answer: C
99. This situation is an example of what type of discrete probability distribution?
A) Continuous probability distributio
107. What is the mean number of days absent?
A) 1.00
B) 0.40
C) 0.72
D) 2.5
Answer: C
Difficulty: Easy
Goal: 3
What is the standard deviation of the number of debit card purchases? _
Answer: 2.24
112. What is the shape of this distribution? Explain your a
107. What is the mean number of days absent?
A) 1.00
B) 0.40
C) 0.72
D) 2.5
Answer: C
Difficulty: Easy
Goal: 3
What is the shape of this distribution? Explain your answer.
Answer: The binomial distribution is perfectly symmetric because the probability of
107. What is the mean number of days absent?
A) 1.00
B) 0.40
C) 0.72
D) 2.5
Answer: C
Difficulty: Easy
Goal: 3
What is the variance of the number of days absent?
A) 1.99
B) 1.41
C) 5.00
D) 55.52
Answer: A
109. Given the probability distribution, which of
What is the probability that on a randomly selected day she will have five messages?
A) 0.0067
B) 0.875
C) 0.175
D) 1.0
Answer: C
106. What is the probability that on a randomly selected day she will have two
messages?
A) 0.0067
B) 0.0014
C) 0.420
D) 0.08
What is the probability that at least ten pay in cash?
A) 0.416
B) 0.575
C) 0.586
D) 0.425
Answer: B
97. What is the probability that no more than twenty pay in cash?
A) 0.0
B) 0.1
C) 0.9
D) 1.0
Answer: D
Difficulty: Medium
Goal: 4
98. What is the probabi
What is the probability that on a randomly selected day she will have no messages?
A) 0.0067
B) zero
C) 0.0335
D) Impossible to have no messages
Answer: A
Difficulty: Hard
Goal: 6
105. What is the probability that on a randomly selected day she will have
What is the probability that on a randomly selected day she will have two messages?
A) 0.0067
B) 0.0014
C) 0.420
D) 0.084
Answer: D
Use the following to answer questions 107-109:
A company is studying the number of monthly absences among its 125 employees
What is the probability that at least one woman is selected?
A) 8/15
B) 3/5
C) 2/3
D) 3/4
Answer: C
Fill-in-the-Blank
102. What is the probability that exactly one woman is selected? _
Answer: 8/15 or 0.5333
Difficulty: Hard
Goal: 5
103. This is an exampl
What is the probability that exactly one woman is selected? _
Answer: 8/15 or 0.5333
103. This is an example of what type of probability distribution? _
Answer: hypergeometric
Difficulty: Medium
Goal: 6
Multiple Choice
Use the following to answer question
What is the probability that fifteen or more customers will want hot peppers? _
Answer: 0.0000
95. This situation is an example of what type of discrete probability distribution?
_
Answer: binomial probability distribution
Difficulty: Medium
Goal: 4
Multi
What is the probability that exactly ten customers will ask for hot peppers? _
Answer: 0.015
93. What is the probability that between two and six people inclusive want hot
peppers? _
Answer: 0.708
Difficulty: Hard
Goal: 4
94. What is the probability that
What is the probability that no more than twenty pay in cash?
A) 0.0
B) 0.1
C) 0.9
D) 1.0
Answer: D
98. What is the probability that more than ten and less than fifteen customers pay in
cash?
A) 0.541
B) 0.401
C) 0.380
D) 0.562
Answer: C
Difficulty: Hard
What is the only variable in the Poisson probability formula?
A)
B) x
C) e
D) P: Medium
Goal: 6
68. Which of the following is NOT a characteristic of a binomial probability
distribution?
A) Each outcome is mutually exclusive
B) Each trial is independent
C
What is the probability that between two and six people inclusive want hot peppers?
_
Answer: 0.708
94. What is the probability that fifteen or more customers will want hot peppers?
_
Answer: 0.0000
Difficulty: Hard
Goal: 4
95. This situation is an exampl
What is the following table called
A) Probability distribution
B) Cumulative frequency distribution
C) Standard deviation
D) Frequency table
Answer: A
67. What is the only variable in the Poisson probability formula?
A)
B) x
C) e
D) P
Answer: B
Difficulty
107. What is the mean number of days absent?
A) 1.00
B) 0.40
C) 0.72
D) 2.5
Answer: C
Difficulty: Easy
Goal: 3
What is the difference between a binomial and a hypergeometric distribution?
Answer: For a binomial distribution, the trials are independent and
To construct a binomial distribution, it is necessary to know the total number of trials and
the probability of success on each trial.
Answer: True
26. If the probability of success ( ) remains the same, but n increases, the shape of the
binomial distribu
What is a listing of all possible outcomes of an experiment and their corresponding
probability of occurrence called?
A) Random variable
B) Probability distribution
C) Subjective probability
D) Frequency distribution
Answer: B
49.
Which one of the followi