## 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)

a. |
infinite sequence |

b. |
finite sequence |

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 |

b. |
binomial probability distribution |

c. |
hypergeometric probability distribution |

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 |

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 |

b. |
random variance |

c. |
random variable |

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?

a. |
∑f(x) = 0 for all values of x |

b. |
f(x) 1 for all values of x |

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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