Week 7
Inference for difference in means, one proportion, and difference in proportions, and power
Day11
- Inference for difference in means from two independent sample (2-sample t-test)
- Power and sample size calculations
Note
Day 11 is the last day of new material for Exam 2, which will cover the material from Days 7-11.
Slides
Datasets
All datasets can be found on GitHub
Class discussion
Class discussion Google doc link
Questions are all from HW 6
- Book 5.26 a-b (HW includes part (c) as well)
- R1: DDS expenditures by ethnicity
- PSS1: Book 4.22 - Power & sample size T/F questions
- PSS2: Power & sample size calculations
Day12
- Inference for proportions
- CIs vs. hypothesis tests
- One proportion from one sample
- Difference in proportions from two independent samples
Slides
Class discussion
Class discussion Google doc link
Questions are all from HW 7
- Book 8.2, 8.14, 8.24 (plus extra (d))
- PSS1: Legalize Marijuana, Part III
Homework
- HW 6 due on Sat, 11/11
- Covers Day 11
- Updated 11/6/23: moved Day 12 questions to HW 7
- For book exercises, make sure to include all steps in a hypothesis test (where applicable) as outlined in the class notes.
- Do not forget to include a discussion on whether you think the test (or CI) assumptions have been satisfied. Are there assumptions you need to make in order for them to be satisfied? Whether you believe they are satisfied or not, continue to run the hypothesis test (or CI) as instructed.
Recordings
- Pre-recorded lessons are on Echo Cloud (aka echo 360 or echo video).
- These can be accessed in Sakai by navigating to the BSTA 511/611 page and clicking on the
Echo Cloudoption in the left-side menu. - This will redirect you to an echo video page with a list of pre-recorded videos.
- These can be accessed in Sakai by navigating to the BSTA 511/611 page and clicking on the
- In-class recording links are on Sakai. Navigate to Course Materials -> Schedule with links to in-class recordings. Note that the password to the recordings is at the top of the page.