ANOVA

Question 1

variables used in anova

Answer 1

1 categorical 1 quantitative

Question 2

question ANOVA solves

Answer 2

do means of quantitative variable depend on which group (given by categorical variable) the individual is in?

Question 3

anova advantage over t-test

Answer 3

allows for 3 or more groups

Question 4

anova null and alternative

Answer 4

means of groups equal

not all means are equal (doesn’t say which is different)

Question 5

assumptions of ANOVA

Answer 5

each group normal
standard deviations of each group equal
independent samples

Question 6

how to check for normality

Answer 6

what is known about population
histogram for each group
normal quantile Q-Q plot for each group
consideration fo sample size

Question 7

anova f statistic formula

Answer 7

variation between groups/variation within groups

Question 8

Large F

Answer 8

evidence against null since indicates that there is more difference between groups than within groups

Question 9

what if find a large F value

Answer 9

Do Tykey’s Honest Signifiacnt Differences Method for multiple comparisons