Modeling each auction type
You just saw that the opening bid price appeared not to affect the final sale price of Palm Pilots in the eBay auctions. Now let's look at what happens when you model the three auction types (3 day, 5 day, and 7 day) separately.
auctions
is available; dplyr
and ggplot2
are loaded.
This exercise is part of the course
Intermediate Regression in R
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Fit linear regression of price vs. opening bid and auction type, with an interaction.
mdl_price_vs_both <- ___
# See the result
mdl_price_vs_both