What two parameters are estimated in a simple linear regression model?

y-intercept and slope Magnitude Direction and magnitude x and y

Which one of the following is not part of data preparation as defined and taught in this course?

Forecasting Running queries Data cleaning Formatting the object

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

Which one of the following is a great add-on package for data cleaning?

tidyr ggplot2 lattice forecast

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

Subsetting Indexing Mapping Mincing