1 / 5   Decision tree classifiers are what?

Simple and transparent complex and opaque Complex but transparent Simple but opaque

2 / 5   What can you do with the 'by' parameter of a data.table?

Group the output table Select a specific column Add an extra row to your dataset Connect several filter criteria

3 / 5   Which of the following analysis are incredibly hard to infer ?

Inferential Causal Exploratory Mechanistic

4 / 5   What describes data sets of the past compared to today's data sets?

They were small, slow, and little diversity They provided little value They were stored in mainframes They were largely paper based

5 / 5   Which one is NOT a dplyr function for mutating joins?

middle_join inner_join left_join right_join