ANOVA

Question 1

ANOVA

Answer 1

Comparing amount of within group variation to the amount of between group variation.
If amount of between group variation is low, compared to amount of within group variation, then means of groups probability similar to each other.

Question 2

ANOVA assumptions

Answer 2

1) Each of the k samples drawn from a normal distribution
2) Variances of the k samples are equal
3) Observations within each of the k samples are independent of one another

Question 3

Tests for equality of sample variances

Answer 3

Hartley’s or Bartlett’s tests

Question 4

Kruskal-Wallist test

Answer 4

H0: k distributions are the same
Ha: Not all k distributions are the same
Like Wilcoxon test, based on ranks of observations rather than data themselves