Which word or phrase completes the statement; "Adata scientist would consider a RDBMS is to a table as R is to a_____."?

You are analyzing data in order to build a classifier model. You discover non-linear data and discontinuities that will affect the model.
Which analytical method would you recommend?

Which ROC curve represents a perfect model fit?
A)

B)

C)

D)

Refer to the exhibit.

You are assigned to do an end of the year sales analysis of 1, 000 different products, based on the transaction table.
Which column in the end of year report requires the use of a window function?

Which graphical representation shows the distribution and multiple summary statistics of a continuous variable for each value of a corresponding discrete variable?