Question 6: The history of data visualization includes contemporary methods that permit "linkages" of related data sets. Which of the following exemplifies the linkages concept?

Select one:

a. A researcher explored a scatterplot of income and patriotism for three different groups of voters, seeking to compare the correlations in each and if they varied.

b. An analyst adjusted the opacity of a random sample of data points.

c. A display of outliers from a regression analysis helped to identify a number of cases to be excluded.

d. A boxplot provided labels for specific points in a distribution.

Question 7: Wainer and Velleman (2001) described how "arm-chair" perspectives on the world were an impediment to graphic visualization. Why does he think this is the case?

Select one:

a. Arm-chair philosophers were bound by religion to shun science

b. Empiricism by definition is concerned with formulaic approaches to analysis

c. Rationalism did not encourage making observations about the world or using data to understand it

d. Empiricism evolved so rapidly that scholars could not keep pace with developments.

Question 8: Which of the following is NOT a dplyr function?

Select one:

a. concatenate

b. select

c. summarise

d. mutate

e. transmute