Deck 3: Graphical Descriptive Methods Nominal Data

Question 1

Which of the following best describes a bar chart?

Answer 1

A

Question 2

When a comparison of two breakdowns is desired, component bar charts offer a good alternative to using two pie charts.

Answer 2

True

Question 3

Which of the following statements is true? $\begin{array}{|l|l|}\hline A&\text {All calculations are permitted on nominal (categorical) data. }\\\hline B&\text {A contingency table lists the counts of each combination of the values }\\&\text {of the two variables.}\\\hline C&\text { Bivariate refers to the distribution of one variable.}\\\hline D&\text {A contingency table cannot be based on two nominal variables. }\\\hline \end{array}$

Answer 3

B

Question 4

According to the Housing Mobility section of the General Social Survey, Victoria, 2006 (ABS, Catalogue Number: 4159.2.55.001), about 1493 thousand people aged 18 years or over moved in the last five years. Of these people, 758.4 thousand moved for housing reasons, 170.2 thousand moved for employment reasons, 398.6 thousand moved for family reasons and 167.2 thousand moved for other reasons.
a. Construct a pie chart.
b. Interpret your pie chart.

Question 5

An automobile insurance agent believes that company A is more reliable than company
B. The scale of measurement that this information represents is the ordinal scale. This could be displayed with a pie chart.

Question 6

Construct a pie chart for the sample of 200 business school graduates is shown in the following table.

Question 7

Which of the following applies to graphical techniques to describe ordinal data?

Question 8

Voters participating in a recent election exit poll in a Queensland electorate were asked to state their political party affiliation as well as their gender. Coding the data 1 for Coalition, 2 for minor parties and 3 for Labor, and F for female, M for male.

a. Create a cross classification table of gender by political affiliation.
b. Create a component bar chart, for each gender.
c. Interpret your component bar chart by gender.

Question 9

The wedges of a pie chart, if displayed as proportions, will sum to 1 or 100%.

Question 10

If the focus is to compare the size or frequency of various categories, a bar chart may be appropriate. Pie charts are effective whenever the objective is to display the components of a whole entity in a manner that indicates their relative sizes.

Question 11

Which of the following is a graphical technique used to present nominal (categorical) data?

Question 12

Voters participating in a recent election exit poll in a Queensland electorate were asked to state their political party affiliation. Coding the data 1 for Coalition, 2 for minor parties and 3 for Labor, the data collected were as follows: Create a bar chart to display the political party affiliation in the Queensland electorate. Write a short sentence to describe the political affiliation.

Question 13

Which of the following statements about pie charts is false? $\begin{array}{|l|l|}\hline A&\text {Fie charts can only be used for nominal data. }\\\hline B&\text { Fie chats are usually used to display the relative sizes of categories for qualitative data.}\\\hline C&\text { Fie charts always have the shape of a circle.}\\\hline D&\text {The area of each slice of a pie chart is proportional to the rel ative frequency of the }\\&\text {corresponding category. }\\\hline \end{array}$

Question 14

Given the following five categories and the number of times each occurs, construct a pie chart and a bar chart.

Question 15

A pie chart is always preferable to a bar chart, when describing a nominal variable.

Question 16

A bar chart is a graphical display of a nominal (categorical) variable. The reason for the gaps between the bars is to emphasise that the bars can be placed in any order as the variable is categorical.

Question 17

Which of the following statements is true? $\begin{array}{|l|l|}\hline A&\text { A contingency table may also be called a cross classi fication table }\\\hline B&\text { A contingency table is used to describe two nominal variables.}\\\hline C&\text { A bar chart may be used as a graphical display of a contingency table.}\\\hline D&\text {All of these choices are correct. }\\\hline \end{array}$

Question 18

Car buyers were asked by a car dealer to rate their level of satisfaction with the service they had
received. The four ratings were Excellent (E), Good (G), Satisfactory (S) and Unsatisfactory (U). The
following data were obtained.
a. Create a bar chart of the level of satisfaction with the service.
b. Create a pie chart of the level of satisfaction with the service.

Question 19

Identify the type of data for which each of the following graphs is appropriate.
a. Pie chart.
b. Bar chart.

Question 20

Which of the following best describes a component bar chart?