ANOVA

Question 1

What does an ANOVA do?

Answer 1

Compares several means and can manipulate more than one

Question 2

Is ANOVA an omnibus test

Answer 2

Yes

Question 3

Why can’t you do multiple t-tests?

Answer 3

Family wise error increases

Question 4

Calculate family wise error

Answer 4

1 - (0.95) to the power of n (number of tests)

Question 5

DF of SMm

Answer 5

One less than the value used to calculate e.g. number of means

Question 6

DF of SSr

Answer 6

number of ppts in each group - 1

Question 7

DF of SSt

Answer 7

number of all observations - 1

Question 8

When to use apriori tests

Answer 8

Planned and hypothesis led, best

Question 9

When to use post hoc tests

Answer 9

Unplanned or trend analysis

Question 10

Rules for planned contrasts

Answer 10

Tests must be independent from each other, only compare 2 ‘chunks’ of variance and one less than the number of groups can be run, if a group isn’t involved code as 0

Question 11

Coding for planned contrasts must =

Answer 11

0

Question 12

Bonferoni

Answer 12

alpha level / number of tests

Question 13

Why use Bonferoni

Answer 13

Very conservative

Question 14

Trend analysis linear

Answer 14

straight line

Question 15

Trend analysis quadratic

Answer 15

curved line

Question 16

Trend analysis cubic trend

Answer 16

one peak and one trough

Question 17

Trend analysis quatic trend

Answer 17

2 troughs one peak