Chapter 2 test bank (other questions printed with graphs to look at)

18. The sum of the relative frequencies for all classes will always equal _____.

1

80. For stem-and-leaf displays where the leaf unit is not stated, the leaf unit is assumed to equal _____.

1

The minimum number of variables represented in a bar chart is _____.

1

The minimum number of variables represented in a histogram is _____.

1

72. A tabular method that can be used to summarize the data on two variables simultaneously is called _____.

a crosstabulation

7. Data that provide labels or names for groupings of like items are known as _____.

a. categorical data

8. A researcher is gathering data from four geographical areas designated: South = 1; North = 2; East = 3; West = 4. The designated geographical regions represent _____.

a. categorical data

9. A researcher asked 20 people for their zip code. The respondents zip codes are an example of _____.

a. categorical data

14. If several frequency distributions are constructed from the same data set, the distribution with the widest class width will have the _____.

a. fewest classes

62. A graphical presentation of a frequency distribution, relative frequency distribution, or percent frequency distribution of quantitative data constructed by placing the class intervals on the horizontal axis and the frequencies on the vertical axis is a _____.

histogram

63. A common graphical presentation of quantitative data is a _____.

histogram

64. When using Excel to create a __________, one must edit the chart to remove the gaps between rectangles.

histogram

65. A __________ can be used to graphically present quantitative data.

histogram and a stem-and-leaf display

13. In constructing a frequency distribution, as the number of classes is decreased, the class width _____.

increases

78. Before drawing any conclusions about the relationship between two variables shown in a crosstabulation, you should _____.

investigate whether any hidden variables could affect the conclusions

66. A(n) __________ is a graph of a cumulative distribution.

ogive

69. To construct a pie chart using Excel's Chart Tools, choose __________ as the chart type.

pie

3. Which of the following graphical methods is most appropriate for categorical data?

pie chart

56. A graphical device for presenting categorical data summaries based on subdivision of a circle into sectors that correspond to the relative frequency for each class is a _____.

pie chart

81. Which of the following graphical methods is not intended for quantitative data?

pie chart

67. Excel's Chart Tools can be used to construct a _____.

All of these can be constructed using Excel's Chart Tools. -bar chart -pie chart -histogram

61. Excel's __________ can be used to construct a frequency distribution for quantitative data.

PivotTable report

73. Excel's __________ can be used to construct a crosstabulation.

PivotTable report

74. In a crosstabulation, _____.

either or both variables can be categorical or quantitative

77. When the conclusions based upon the aggregated crosstabulation can be completely reversed if we look at the unaggregated data, the occurrence is known as _____.

Simpson's paradox

23. What is the difference between a bar graph and a histogram?

b. A histogram displays quantitative data, while a bar graph displays categorical data.

6. The proper way to construct a stem-and-leaf display for the data set {62, 67, 68, 73, 73, 79, 91, 94, 95, 97} is to _____.

b. include a stem labeled '8' and enter no leaves on the stem

10. The age of employees at a company is an example of _____.

b. quantitative data

12. The sum of frequencies for all classes will always equal _____.

b. the number of elements in a data set

57. Categorical data can be graphically represented by using a(n) _____.

bar chart

16. There are 20 boys and 8 girls in a class. What type of graph can be used to display this information?

bar graph

58. Fifteen percent of the students in a School of Business Administration are majoring in Economics, 20% in Finance, 35% in Management, and 30% in Accounting. The graphical device(s) that can be used to present these data is(are) _____.

both a bar chart and a pie chart

59. Frequency distributions can be made for _____.

both categorical and quantitative data

20. The percent frequency of a class is computed by _____.

c. multiplying the relative frequency by 100

4. In a stem-and-leaf display, _____.

c. one or more digits are used to define each stem, and a single digit is used to define each leaf

5. A graphical method that can be used to show both the rank order and shape of a data set simultaneously is a _____.

c. stem-and-leaf display

11. A frequency distribution is a _____.

c. tabular summary of a set of data showing the number of items in each of several nonoverlapping classes

21. A dot plot can be used to display _____.

c. the distribution of one quantitative variable

22. In a cumulative frequency distribution, the last class will always have a cumulative frequency equal to _____.

c. the total number of elements in the data set

68. To construct a bar chart using Excel's Chart Tools, choose __________ as the chart type.

column

70. To construct a histogram using Excel's Chart Tools, choose __________ as the chart type.

column

79. A histogram is NOT appropriate for displaying which of the following types of information?

cumulative frequency

60. The total number of data items with a value less than or equal to the upper limit for the class is given by the _____.

cumulative frequency distribution

15. Excel's __________ can be used to construct a frequency distribution for categorical data.

d. COUNTIF function

25. The difference between the lower class limits of adjacent classes provides the _____.

d. class width

17. The relative frequency of a class is computed by _____.

d. dividing the frequency of the class by the sample size

19. The height and weight are recorded by the school nurse for every student in a school. What type of graph would best display the relationship between height and weight?

d. scatter diagram

55. A graphical device for depicting categorical data that have been summarized in a frequency distribution, relative frequency distribution, or percent frequency distribution is a(n) _____.

stem-and-leaf display

71. Excel's Chart Tools does NOT have a chart type for constructing a _____.

stem-and-leaf display

82. Which of the following is LEAST useful in studying the relationship between two variables?

stem-and-leaf display

76. In Excel, the line of best fit for the points in a scatter diagram is called a _____.

trendline