Week 4 Simple Between and One-Way ANOVA

Question 1

What is the grand mean?

Answer 1

The mean of all group means

Question 2

How to calculate within group deviations?

Answer 2

Subject score - group mean

Question 3

How to calculate between group deviations?

Answer 3

Group mean - grand mean

Question 4

How to calculate total deviation for a single score

Answer 4

Subject score - grand mean

Question 5

What is partitioning?

Answer 5

Subdivision of the total deviation. Expressing an individual subjects score as a deviation from the grand mean

Question 6

How to partition?

Answer 6

subscore - grand mean = (groupmean - grand mean) + (subscore - groupmean)

Question 7

What are the two components of partitioning?

Answer 7

Between groups deviation (treatment effects) and Within groups deviation (error alone)

Question 8

What is variance defined as?

Answer 8

v= sum of sq deviations from mean/ degrees of freedom

Question 9

How is the total sums of squares obtained?

Answer 9

= sum (score - grand mean)2

Question 10

What are sums of squares?

Answer 10

sum of the squared deviation scores

Question 11

What must sums of squares be converted to for ANOVA?

Answer 11

mean squares!

Question 12

How are mean squares calculated?

Answer 12

=SS/df

Question 13

What are the assumptions of the One-Way ANOVA?

Answer 13

Independence (scores independent)
Normality
Homogeneity of Variance

Question 14

What are the two types of type 1 error?

Answer 14

Per comparison

Familywise

Question 15

What is per comparison?

Answer 15

considers probability of making type 1 error to be .05 for each comparison

Question 16

What is familywise?

Answer 16

considers the probability of making one or more type 1 errors in a set of comparisons