15. ANOVA!!

Question 1

ANOVA purpose

Answer 1

comparing the means of more than 2 groups

is there any VARIANCE among groups in the mean value?

Question 2

ANOVA stands for..

Answer 2

Analysis of Variance

Question 3

ANOVA null hyp

Answer 3

Variance among groups = 0

mean1 = mean2 = mean3

where mean is mew (funky u)

Question 4

MSgroup, what does it estimate?

Answer 4

“mean squares group”, n*variance among sample means

Question 5

Basically testing if….

Answer 5

variance among sample means is equal to variance due to sampling error

sigma^2 xbar = (sigma^2 x) / n

Question 6

MSerror estimates

Answer 6

variance within groups

MSerror = variance between individuals within groups