Studio 9
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Topics: NHST, Comparison of Frequentist and Bayesian methods
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Before class:
1. Post studio9.zip containing: studio9.r, studio9-sol.r, studio9Data.tbl
2. Students should download this zip file and unzip it in their 18.05 R directory.
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For class:
1. Use studio9-slides.pdf
2. Follow class script below.
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After class:
1. Post studio9-slides-all.pdf
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Class script
Slide 1: Everyone should have downloaded and unzipped studio9.zip
Slide 2: Comparison of frequentist and Bayesian methods.
-- This is another small piece in trying to understand the differences,
in particular to see that the p-value is not probability that the null
hypothesis is true.
Slides 3-6: BOARD AND R PROBLEM: Coins
-- Have students outline the solution at the boards and
then do the computations in R.
-- Part (a): should be straighforward for students.
-- Part (b): at this point the class might need the hint to use
Bayes theorem and a Bayesian update table.
DISCUSSION:
-- The solutions are given in the in-class slides.
-- It's worth going through them carefully to review Bayes theorem.
Slide 7: TABLE QUESTION: NHST and different paths to the same data
-- Have students discuss this at their tables.
-- The point is that the exact experimental setup is critical to NHST.
-- Let them get to the main point so they will be primed to
understand your explanation.
DISCUSSION:
--Go through the solutions.
Slides 8-9: R PROBLEM: Chi-square test for homogeneity