Psyc 2525 test 3

formula for n2 (eta squared)

between groups sums of squares __________________________________________ Total sums of squares

The corresponding test statistic for the ANOVA is the ______. a. p statistic b. t statistic c. F statistic d. R statistic

c. F Statistic

T-test for independent means

df-n1-1+n2-1

formula for t-test dependent means

df=n-1 ( where n equals the number of pairs of observations)

POST HOE COMPARISONS

In relation to ANOVA, tests that are done in addition to ANOVA in order to look at specific group comparisons

T-TEST FOR DEPENDENT SAMPLES

Indicates that a single group of the same subject is being studied under two conditions

fACTORIAL Desgin

Used to explore more than one treatment factor

t-test for dependent samples determines what?

Whether there is a singifically matched on characteristics important to the study

effect size

a measure of how different groups are from one another ( i.e, a measure of the magnitude of the effect)

Simple analysis of variance

a type of ANOVA in which one factor or treatment variable ( such as group membership) is being explored

degrees of freedom

a value that approximates the sample size and is a component of many statistical tests

Pooled standard deviation

part of the formula for the effect size that is similar to an average of the standard deviations from both groups

Analysis of Variance ( ANOVA)

A test for the difference between two or more means

An effect size of .03 would be considered: a. Small B. medium C. Large

A. small

Homogeneity of Variance Assumption

An assumption underlying the t-test that the amount of variability in both groups is equal

an effect size of .12 would be considered? a. Small B. Medium C. Large

B. Medium

An effect size of .16 would be considered : a. small b. medium c. large

C. Large

Which of the following is the type of test used to look at specific group comparisons? a. simple analysis of variance b. factorial design c. Post hoc comparisons d. Independent- samples T-Test

Factorial Design

n 2 (eta squared)

the meausre of effect size used for ANOVA F-tests

When should you a t-test for an independent mean>

when you are looking at the difference between the average scores of two groups on one or more variables and the two groups are independent of one another (i.e, are not related in any way )