Everything that was on Quiz 1 and 2, could also be on Quiz 3.
Reading: Sleuth: 3 & 4
Practice Questions: Conceptual Exercises in Sleuth
Page 77: 1, 2, 4, 7, 8, 9, 10, 11, 12, 13, 14, 16, 17
Page 106: 1, 2, 3, 4, 6, 7, 8
State the assumptions of the two sample t-test.
To which assumptions, and under what conditions, is the two sample t-test robust?
What does robustness mean?
What does resistance mean?
Give an example of a resistant statistic.
Identify possible sources of dependence in a study design.
Identify data that may benefit from a log-transformation.
Given t-test results on log-transformed data, write a statistical summary on the original scale of measurement.
For the five tests (Wilcoxon Rank Sum, Levene’s Test, Welch’s t-test, Sign Test, Wilcoxon Signed Rank test), you should be able to:
For the Wilcoxon Rank Sum test and Sign test you should also be able to:
Identify appropriate tests from a study description.
Explain why the difference in means doesn’t tell the whole story in the unequal variance case.