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 )
