Test1- Answer Key
Business Statistics

Chapter I:

1.Which scale of measurement can be either numeric or nonnumeric? a. | Nominal | b. | Ratio | c. | Interval | d. | None of these alternatives is correct. |

ANS: A PTS: 1 TOP: Descriptive Statistics

2.Which of the following can be classified as quantitative data? a. | interval and ordinal | b. | ratio and ordinal | c. | nominal and ordinal | d. | interval and ratio |

ANS: D PTS: 1 TOP: Descriptive Statistics

3.A population is a. | the same as a sample | b. | the selection of a random sample | c. | the collection of all items of interest in a particular study | d. | always the same size as the sample |

ANS: C PTS: 1 TOP: Descriptive Statistics

4.On a street, the houses are numbered from 300 to 450. The house numbers are examples of a. | categorical data | b. | quantitative data | c. | both quantitative and categorical data | d. | neither quantitative nor categorical data |

ANS: A PTS: 1 TOP: Descriptive Statistics

Chapter II:

Exhibit 2-1
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The numbers of hours worked (per week) by 400 statistics students are shown below.

Number of hours | Frequency | 0 - 9 | 20 | 10 - 19 | 80 | 20 - 29 | 200 | 30 - 39 | 100 |
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5.Refer to Exhibit 2-1. The class width for this distribution a. | is 9 | b. | is 10 | c. | is 39, which is: the largest value minus the smallest value or 39 - 0 = 39 | d. | varies from class to class |

ANS: B PTS: 1 TOP: Descriptive Statistics

6.Refer to Exhibit 2-1. The number of students working 19 hours or less a. | is 80 | b. | is 100 | c. | is 180 | d. | is 300 |

ANS: B PTS: 1 TOP: Descriptive Statistics

7.Refer to Exhibit 2-1. The