9/16/2026

Questions on Section 2.1 and GoogleDrive\Stat206-DataAnalysis-S2026\2ePowerPoint\Sec2.1R

• Inferences about the slope of the population regression line
• Confidence intervals
• Hypothesis tests

Questions on Section 2.2, Section 2.3, and GoogleDrive\Stat206-DataAnalysis-F2026\2ePowerPoint\Sec2.2-3R

• ANOVA for SLM
• Partitioning variability
  • R-squared
• Inference for Correlation
  • t-test for r

Questions on Section 2.4 and GoogleDrive\Stat206-DataAnalysis-S2026\2ePowerPoint\Sec 2.4R

• CI for a mean response
• PI for a new response

Demonstration

• See GoogleDrive\Stat206-DataAnalysis-S2026\2eMarkkdown\Sec2.4.Rmd

Demonstration for Breakfast Cereal - see Exercise 2.15 on p. 78 and Cereal.R

Additional demonstrations with R

• See GoogleDrive\Stat206-DataAnalysis-S2026\2eMarkkdown\Sec2.1.Rmd
• See GoogleDrive\Stat206-DataAnalysis-S2026\2eMarkkdown\Sec2.2-3.Rmd
• See GoogleDrive\Stat206-DataAnalysis-S2026\2eMarkkdown\Sec2.4.Rmd

In Class Exercises

• Compute confidence intervals for the Olympic Long Jump data set.
• Calculate and plot the residuals, standardized residuals, and studentized residuals against Year for the Olympic Long Jump data. Identify Bob Beaman on your plots.
• What is the leverage value hi for Bob Beaman?
• 2.1, 2.3, 2.5, 2.7, 2.16, and 2.44

We will have our first quiz on the material from Chapters 0 and 1 in class on Friday. Please complete your reading of Chapter 2 for Monday. We have a problem session on the Chapter 2 exercises on Monday.