Inference overview

Lecture 22

Dr. Mine Çetinkaya-Rundel

Duke University
STA 199 - Fall 2022

11/15/22

Warm up

While you wait for class to begin…

Important

Come up with at least one question you’d like to see answered in the Exam 1 review on Thursday.

Go to slido.com and submit your question with the code #sta199exam2.

You can also upvote others’ questions.

Announcements

• My office hours today 3:30-5pm on Zoom: bit.ly/minezoom.

• Lab 6 due Friday night (11:59 pm) – but I strongly recommend you finish and submit it before the exam begins!

• Exam 2 is released on Thursday at noon and is due at 2pm on Monday.

  • No TA OH during the exam.

  • I will have OH 4-5pm on Friday (on Zoom).

  • Any clarification questions must be emailed to me only.

  • No Slack use during the exam, even about non-exam related questions.

Exam study tips

• Take notes that you can reference
• Review feedback given to you on graded work
• Revisit AEs
• Review suggested solutions
• Ask questions

Topics for review

Come up with at least one question you’d like to see answered in the Exam 2 review on Thursday.

Go to slido.com and submit your question with the code #sta199exam2.

You can also upvote others’ questions.

03:00

Application exercise

Recap of inference ideas

• A hypothesis test is a statistical technique used to evaluate competing claims (null and alternative hypotheses) using data.
• We simulate a null distribution using our original data.
• We use our sample statistic and direction of the alternative hypothesis to calculate the p-value.
• We use the p-value to determine conclusions about the alternative hypotheses.

ae-19

• Go to the course GitHub org and find your ae-19 (repo name will be suffixed with your GitHub name).
• Clone the repo in your container, open the Quarto document in the repo, and follow along and complete the exercises.
• Render, commit, and push your edits by the AE deadline – 3 days from today.