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13th Edition

Anderson

Publisher: CENGAGE L

ISBN: 9781305881884

Chapter 5.1, Problem 6E

Textbook Problem

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Listed is a series of experiments and associated random variables. In each case, identify the values that the random variable can assume and state whether the random variable is discrete or continuous.

Experiment |
Random Variable (x) |

a. Take a 20-question examination | Number of questions answered correctly |

b. Observe cars arriving at a tollbooth for 1 hour | Number of cars arriving at tollbooth |

c. Audit 50 tax returns | Number of returns containing errors |

d. Observe an employee’s work | Number of nonproductive hours in an eight-hour workday |

e. Weigh a shipment of goods | Number of pounds |

**a.**

To determine

Check whether the random variable is discrete or continuous and state the possible values of the random variable.

A twenty question examination is considered and the random variable *x* denotes the number of questions answered correctly.

*Random Variable*:

A random variable *x* is a numerical outcome of a probability experiment. Moreover, there is a numerical value which is determined by chance for each outcome in the procedure or experiment.

*Discrete random variable*:

A discrete random variable takes a collection of values which is finite or countable...

**b.**

To determine

**c.**

To determine

**d.**

To determine

Check whether the random variable is discrete or continuous and to state the possible values of the random variable.

**e.**

To determine

STATISTICS F/BUSINESS+ECONOMICS-TEXT

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