1. A numerical description of the outcome of an experiment
is called a
A.descriptive statistic
B.probability function
C.variance
D.random variable
E.none
of the above
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2. The random variable that can assume only a finite
number of values is referred to as a(n)
A.infinite sequence
B.finite sequence
C.discrete random variable
D.discrete probability function
E.none
of the above
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3. A continuous random variable may assume
A.any value in an interval or collection of intervals
B.only integer calues in an
interval or collection of intervals
C.only fractional values in an interval or collection of
intervals
D.only the positive integer values in an interval
E.none
of the above
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The next two questions are
based on the information provided below.
The student body of a large
university consists of 60% female students. A random sample of 8
students is selected
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4. What is the probability that among the students in the
sample exactly two are females?
A.0.0896
B.0.2936
C.0.0413
D.0.0007
E.none
of the above
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5. What is the probability that among the students in the
sample at least 7 are female?
A.0.1064
B.0.0896
C.0.0168
D.0.8936
E.none
of the above
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6. Four percent of the customers of a mortgage company
default on their payments. A sample of five customers is
selected. What is the probability that exactly two customers in the
sample will default on their payments?
A.0.2592
B.0.0142
C.0.9588
D.0.7408
E.0.0000
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7. In the textile industry, a manufacturer is interested
in the number of blemishes or flaws occurring in each 100 feet of
material. The probability distribution that has the greatest chance of
applying to this situation is the
A.normal distribution
B.binomila distribution
C.Poisson
distribution
D.uniform distribution
E.none
of the above
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8. Which of the following is not a characteristic
of an experiment where the binomial probability distribution is applicable?
A.the
experiment has a sequence of n identical trials
B.exactly two outcomes are possible on each trial
C.the trials are dependent
D.the probabilities of the outcomes do not change from one
trial to another
E.all
are characteristics of a binomial probability experiment
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The next two questions are
based on the table provided below.
A local bottling company has
determined the number of machine breakdowns per month and their respective
probabilities as shown below:
Number of breakdowns
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Probability
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0
|
0.12
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1
|
0.38
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2
|
0.25
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3
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0.18
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4
|
0.07
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9. The probability of at least 3 breakdowns in a month is
A.0.5
B.0.10
C.0.30
D.0.90
E.none
of the above
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10. Thre probability of on
breakdowns in a month is
A.0.88
B.0.00
C.0.50
D.0.10
E.none
of the above
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