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Flashcards in 29 Anova Deck (21)
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1
Q

based on the standard error of diff between 2 means

A

t test

2
Q

what is bonferroni adjustment?

A

divide alpha by no. of comparisons (decreases significance level)

3
Q

what does anova stand for?

A

analysis of variance

4
Q

anova used for:

A

test hypotheses about diffs between 3+ means (adjust internally for multiple tests)

5
Q

variables happen:

A

between subject and within subject

6
Q

test to supplement anova?

A

post-hoc significance tests

7
Q

prob of post hoc?

A

> chance produce type 1

8
Q

what is EER?

A

experimentwise error rate (probability that at least one test will give type 1 error)

9
Q

control of EER and power of significance tests is ___ related

A

inversely

10
Q

3 conflicting goals of choosing post hoc:

A

1) extract all info from data that is meaningful 2) control EER 3) achieve high lvl power

11
Q

types of post hoc?

A

Fisher’s LSD, Tukey’s HSD, S-N-K, Duncan, Bonferroni, Scheffe, Dunnett

12
Q

least conservative test?

A

Fisher’s LSD

13
Q

most conservative ?

A

Scheffe

14
Q

this type compares each group/treatment to control

A

Dunnett

15
Q

how do LSD, HSD, Duncan’s and SNK differ?

A

tcrit value (same formula for computing t)

16
Q

most researchers believe that _____ proceduures result in too high EER

A

Duncan’s and Fishers

17
Q

which has more power, Tukey or SNK?

A

SNK

18
Q

when have 2+ independent variables use :

A

two way anova (factorial analysis)

19
Q

two way can test for ____

A

main effects and interactions

20
Q

what are main effects?

A

tests of independent variables alone on one dependent variable

21
Q

what are interactions?

A

test of interactions tween variables