Why ANOVA	Pick the test A	Interpreting Factorial Effects	Pick the test B	Effect size and further testing
10	10	10	10	10
20	20	20	20	20
30	30	30	30	30
40	40	40	40	40
50	50	50	50	50
Final Question

If there are four levels of the independent variable, is an ANOVA or t-test faster?

If there are four levels of the independent variable, is an ANOVA or t-test faster?

ANOVA

What does the omnibus test tell us?

If any of the conditions differ from the others

What does the numerator and denominator of the F ratio represent?

Numerator=between groups variance; Denominator=within groups variance

What are the sources of variability in the numerator and denominator of the F ratio?

Numerator: Treatment+Individual Differences+Error; Denominator: Individual Differences+Error

What is the main reason ANOVA is used rather than multiple t-tests?

Familywise Error Rate

You have the population mean, sample mean, and sample standard deviation. What test do you perform?

One-sample t test

SAT scores have a mean of 1060 and a standard deviation of 195. Principal John wants to know if his high school students are scoring lower than average. A sample of his students have a mean of 1010 and a standard deviation of 190. What test should he use?

z test

You are finding the frequency of depression symptoms in a group given CBT and a group given nothing. What test do you use?

Independent groups t test

The relationship between x and y are known. What can you use to make predictions from this information?

Linear regression

Professor Jan teaches four sections of PSY101 in four different rooms. Section one is taught in a room with no windows and beige paint, section two has windows and beige paint, section three has no windows and bright blue paint, and section four has windows and bright blue paint. Jan wants to know if paint color and presence of windows affects the students' scores. What kind of test should she use?

2x2 between subjects factorial ANOVA