Review Sheet for Exam 3
Estimation / Confidence Intervals
What are the differences & similarities between estimation & hypothesis testing?
What is a point estimate?
What is a confidence interval (interval estimate)?
Know how to compute a confidence interval for: (1) a single sample mean using the z-statistic and (2) the t-statistic, for (3) the difference between two independent samples, and for (4) the difference between 2 related (dependent) samples
Know how to compute a point estimate for: (1) a single sample mean using the z-statistic and (2) the t-statistic, for (3) the difference between two independent samples, and for (4) the difference between 2 related (dependent) samples
Understand how to interpret confidence intervals
Understand the tradeoff between precision & confidence
One-way Analysis of Variance (Chapter 16)
Factor & “levels” of a factor
Understand the logic of the F-ratio in ANOVA
Why would we expect an F»1.0 when H0 is true?
Understand between-group variance & within-group variance
Understand conceptually SStotal, SSerror, and SSgroup
What are the properties of the sampling distribution of F?
Know how to compute & interpret an ANOVA
You should be able to read about a study & identify the independent variable (IV), the “levels” of the IV, & the dependent variable
Know how to write H0 & H1 for a one-way ANOVA
You should be able to complete an ANOVA summary table if you're given partial information
Know how to conduct protected t (LSD) tests
Know when you should perform protected t (LSD) tests
Know how to report the results of an ANOVA & protected t (LSD) tests in APA format
What does a significant F-test allow you to conclude ( what can you NOT conclude)?
When do we use ANOVA (F) rather than t? Why can't we do a bunch of t-tests instead of an ANOVA?
What are the assumptions of one-way analysis of variance?
two-way anova (Chapter 17)
Know what notation like 2 X 2 & 2 X 3 means
Know the reasons why one might choose to do a 2-way ANOVA
You should be able to read about a study & identify the independent variables (IV’s), the “levels” of the IV’s, & the dependent variable
Know what an interaction is conceptually, be able to draw an example of an interaction and/or identify an interaction from a graph of means
Know what a main effect is conceptually, be able to draw an example of a main effect and/or identify a main effect from a graph of means
Know what marginal means are and why/when you’d examine them
Know how to write H1 & H0 for main effect & interaction hypothesis tests
Know how to interpret two-way ANOVA output from SPSS
You should be able to complete an ANOVA summary table if you're given
partial information
Know the difference between post-hocs and simple-effects tests. Know when
you use each and why, & know how to interpret the results of both types of tests
Know how to report the results of main effects, interactions, and multiple-comparison tests in APA format
The Big Picture
Know how to read a research description & select ( conduct) the appropriate statistical test!!!!
Be prepared to interpret SPSS output
Please bring the following to the exam:
· Pencil & eraser
· Calculator (non-graphing, non-pda, non-cell phone)