1. Exam 4/19 40 – 50 questions 1.5 hours long
HS 267 Test Prep (4/12/07)
Exam 4/19
40 – 50 questions
1.5 hours long

2. Bring to test Formula sheets with tables Calculator
Part 1 -- Quantitative outcomes (new p. 5 distributed last week)
Part 2 -- Categorical outcomes (distributed last week)
Packets include t, F, and X2 tables
Calculator
Pencils with good erasers
Small blue book

3. Topics Correlation and regression Cross-tabs
Relative risk (including confounding and stratified tables)

4. Correlation & Regression
Scatterplot
Pearson’s correlation coefficient (r) and test of H0: ρ = 0
Least squares regression model including test of H0: β = 0, and confidence interval for β
Necessary conditions (L.I.N.E.)
Transforms (to straighten relations)

5. Cross-Tabulated Counts
Types of samples (naturalistic, cohort, case-control)
R-by-C table
Marginal distributions
Conditional distributions (relationships)
X2 test of association

6. Relative Risks 2-by-2 table Incidences and prevalence
RR estimate and confidence interval
Fisher’s and mid-P exact test
Confounding (stratified tables)