Weekend HW!

Happy Friday! It's the weekend, yay! On Monday we'll wrap up our review of experimental design with some practice/classwork (hopefully) and we'll finish our notes (if necessary). There will be a free response about experimental design on the midterm, so be sure to put some real effort into your homeworks/classwork on this stuff! We have limited practice/notes in class!

Suggested Midterm Review HW:

• Complete 2018 Free Response #5 (provided in class yesterday, or in the link below)
• Score your response--this will allow you to check your understanding, and it will also give you some insight into how I will be grading your midterms!
• Link to ALL released FR and Scoring Rubrics
• Go to 2018 and click on "Free Response Questions," the scroll to #5 for the suggested HW
• You can also look at all 6 questions from last year's free response!
• Choose the "scoring guidelines" (for 2018) to see the scoring rubric--scroll down to #5 for the suggested HW

Weekend HW:

Page 313 - 316: 7abcdefg, 29bc, 31ac

• *Note: the questions for #7 parts abcdefg are on page 313, but the actual #7 on page 314

Today's Class Recap: (slightly varies by period)

• Stamp = midterm review (linear regression)
• Homework Review/Questions...
• Discussed migraine context and the answers to each question
• Notes on blinding
• Discussed confounding variables and how to write about confounding variables using the smoking/Alzheimer's context (middle right slide, or in post below)
• Notes on confounding variables
• Back to blocking and Carofangrow...
• Discussed how to design a completely randomized, blocked experiment
• Why do we use blocking? How do we use blocking?
• How do I choose a variable to block by (and explain why we chose that block)?
• Provided a list of all questions students asked after reading the chapter, with all responses--read this stuff!

On Tuesday we will start class with our chapter 13 vocabulary quiz: here's the list so you can start making your flash cards or a quizlet...

1. Experiment (treatments randomly assigned)
2. Observational Study (no manipulation of factor--no assignment of treatments)
3. Retrospective Observational Study
4. Prospective Observational Study
5. 4 Principles of experimental design (what are the 4?)
6. Factor (the IV, the explanatory variable, the variable we manipulate in an experiment)
7. Levels (the specific values of the factor)
8. Treatments (the "groups" we create--if there is one factor the levels = the treatments; if there are multiple factors, each factor has its levels, and the treatments are all of the different "overall" groups we create)
9. Response Variable (the data we collect--what we're measuring in a study)
10. Random Assignment (where does it happen in an experiment?)
11. Control Group (a group that receives a baseline treatment, typically a placebo, used for comparison)
12. Replication
13. Blocking 
14. Blinding (single v. double blind)
15. Placebo
16. Confounded/Confounding Variable
17. Matching (this is when the subjects in an observational study are paired based on some characteristic--we are specifically pairing two data values)
18. Statistically Significant