Week 11: Statistics in R

DATA 412/612 · November 11

Lectures

• 11.1 Statistics: Tests(PDF)
• 11.2 Statistics: Regression and Summaries(PDF)

Labs

• Lab 11: Tests and Models(PDF)
• Lab 11 solutions (password)

Sample exam

• Midterm 2, sample 1(PDF)
• Midterm 2, sample 2(PDF)

Additional readings

• Tidy Modeling with R: A review of R modeling basics
• broom: Convert model output to tidy tibbles
• R for Data Science: Exploratory data analysis

Discussion

• What is the difference between a statistically significant coefficient and a practically important one?
• After lm(), would you rather report summary() or a tidy table plus a residual plot, and why?