Statistics for Business And Economics 12th Edition by James T. McClave – Test Bank
CHAPTER 5—DISCRETE PROBABILITY DISTRIBUTIONS
MULTIPLE CHOICE
1.Which of the following is a characteristic of an experiment where the binomial probability distribution is applicable?
|
a. |
the experiment has at least two possible outcomes |
|
b. |
exactly two outcomes are possible on each trial |
|
c. |
the trials are dependent on each other |
|
d. |
the probabilities of the outcomes changes from one trial |
ANS: B PTS: 1 TOP: Discrete Probability Distributions
2.A numerical description of the outcome of an experiment is called a
|
a. |
descriptive statistic |
|
b. |
probability function |
|
c. |
variance |
|
d. |
random variable |
ANS: D PTS: 1 TOP: Discrete Probability Distributions
3.A random variable that can assume only a finite number of values is referred to as a(n)
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a. |
infinite sequence |
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b. |
finite sequence |
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c. |
discrete random variable |
|
d. |
discrete probability function |
ANS: C PTS: 1 TOP: Discrete Probability Distributions
4.A probability distribution showing the probability of x successes in n trials, where the probability of success does not change from trial to trial, is termed a
|
a. |
uniform probability distribution |
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b. |
binomial probability distribution |
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c. |
hypergeometric probability distribution |
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d. |
normal probability distribution |
ANS: B PTS: 1 TOP: Discrete Probability Distributions
5.Variance is
|
a. |
a measure of the average, or central value of a random variable |
|
b. |
a measure of the dispersion of a random variable |
|
c. |
the square root of the standard deviation |
|
d. |
the sum of the squared deviation of data elements from the mean |
ANS: B PTS: 1 TOP: Discrete Probability Distributions
6.A continuous random variable may assume
|
a. |
any value in an interval or collection of intervals |
|
b. |
only integer values in an interval or collection of intervals |
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c. |
only fractional values in an interval or collection of intervals |
|
d. |
only the positive integer values in an interval |
ANS: A PTS: 1 TOP: Discrete Probability Distributions
7.A description of the distribution of the values of a random variable and their associated probabilities is called a
|
a. |
probability distribution |
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b. |
random variance |
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c. |
random variable |
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d. |
expected value |
ANS: A PTS: 1 TOP: Discrete Probability Distributions
8.Which of the following is a required condition for a discrete probability function?
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a. |
∑f(x) = 0 for all values of x |
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b. |
f(x) 1 for all values of x |
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c. |
f(x) < 0 for all values of x |
|
d. |
∑f(x) = 1 for all values of x |
ANS: D PTS: 1 TOP: Discrete Probability Distributions
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