One-way ANOVA

Question 1

What are the steps of an F-test?

Answer 1

1. state hypotheses.
2. calculate test statistic. (F-test) F=MSB/MSW
3. use the F-distribution.

Question 2

What does the syntax for a one-way ANOVA look like/

Answer 2

UNIANOVA
y BY group 
/METHOD = SSTYPE (3)
/INTERCEPT = INCLUDE 
/PRINT = DESCRIPTIVE ETASQ HOMOGENEITY 
/CRITERIA = ALPHA  (0.05)
/DESIGN = GROUP

Question 3

Which factors influence ANOVA?

Answer 3

1. alpha level.
2. sample size.
3. within-group variance in the population.
4. effect size.

Question 4

What are the assumptions of the ANOVA?

Answer 4

1. independence of observations.
2. normal distributions.
3. homogeneity of variance.