Which command do you use to measure the strength of the relationship between two numeric variables?

cor() table() mean() sd()

In the past, data analysis was largely limited to whom?

Business analysts Life hackers and hobbyists Data-driven decision makers Scientists and statisticians

Decision tree classifiers are what?

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

In the past, what all that much, the internet wasn't generating?

Data Things Intelligence Profit

What type of geom should you use to create a scatterplot in ggplot2?

point_geom scatter_geom xy_geom density_geom