Conducting an ANOVA test
The box plots made it look like the distribution of pack price was different for each of the three shipment modes. However, it didn't tell us whether the mean pack price was different in each category. To determine that, we can use an ANOVA test. The null and alternative hypotheses can be written as follows.
\(H_{0}\): Pack prices for every category of shipment mode are the same. \(H_{A}\): Pack prices for some categories of shipment mode are different.
We'll set a significance level of 0.1.
late_shipments is available.
This exercise is part of the course
Hypothesis Testing in R
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Run a linear regression of pack price vs. shipment mode
mdl_pack_price_vs_shipment_mode <- ___
# See the results
summary(mdl_pack_price_vs_shipment_mode)