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

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

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

If you want to convert from wide to long form with the package reshape2 you use the function:

melt freeze subset corr

What language feature allows you to slice and dice data in very flexible ways?

Subsetting Indexing Mapping Mincing

With data-driven decision making, organizations use data for what purpose?

To make all non-trivial business decisions To spy on their competition To manipulate people into buying things they don't need To sell to 3rd parties for a profit