MANOVA

Question 1

What is box’s m?

Answer 1

tests that covariance/variance is equal across groups

Question 2

What is different about a manova from an anova?

Answer 2

anova has one dv and multiple categorical ivs, manova has both multiple dvs and multiple categorical ivs

Question 3

What is eta squared?

Answer 3

variance and effect size of the r/s

Question 4

What do you need to perform a MANOVA

Answer 4

1 or more cat ivs, 2 or more continuous dvs, homogeneity of variance acroups groups and homogenity of variance in variance covariance , independent observations

Question 5

What is power usually set to to decide sample size to get the approp power?

Answer 5

.80

Question 6

What is gpower?

Answer 6

a website where you plug in the details and the power you want and it calculates the sample you need to get that

Question 7

What is wilk’s lambada?

Answer 7

measures size of error, 0-1 where 0 is large diff and 1 is no diff

Question 8

What are roy’s largest root and hotellings trace?

Answer 8

used for when assumptions are violated, difficult to interpret, hotellings is more robust and adds up eigenvectors whereas roys reports largest eigenvector and range from 0 to unknown variable that is less than total dvs

Question 9

What is pilia trace?

Answer 9

0-1, where 0 is no diff and 1 is large diff, adds up eigenvectors

Question 10

What to do when manova is sig?

Answer 10

if sig at multivariate lvl, it means the dvs as a group differ, to check which dv is most important remove as a dv and treat as a covariate

Question 11

What is a mancova?

Answer 11

when we control for a variable as a covariate when doing a manova

Question 12

What is a covariate?

Answer 12

a variable that is controlled for to see the difference in other variables when its effect is pulled out