9/1/2025

Lecture - Open Google Drive Stat206-DataAnalysis-F2025\2ePowerPoint\Sec0.1-2R.pptx

Chapter 0

• Review of statistical inference
  • Null hypothesis
  • Alternative hypothesis
  • Hypothesis test
  • Sampling distribution
  • Critical region
  • Significance level
  • Type I and Type II errors
  • Null distribution
  • P-value
• Confidence intervals for a population mean
  • When the population standard deviation is known (not useful)
  • When the population standard deviation is unknown (t interval)
  • Interpreting CI

Introduction to R (see Day1.R)

• Open and demo Chapter0.Rmd (R Markdown file for Chapter 0)
• Reading data from a file - importing Excel files (read Day1-F2025.csv into R)
• Viewing the data
• Sorting data
• Descriptive statistics for the pulse data
• Graphical displays for the pulse data

You can also check out the free labs at Open Intro for review or to get started with R

Class Exercise

1. Based on the data we collected on our first day of class, is 869 miles a plausible value for the distance that students travelled from their home to Kenyon College?

Please complete your reading of Chapter 0 and read Section 1.1 for class on Wednesday