W1 ANOVA

Question 1

When is ANOVA used

Answer 1

when comparing data among multiple groups

Question 2

what does ANOVA stand for

Answer 2

analysis of variance

Question 3

assumptions during ANOVA

Answer 3

normally distributed data
populations have equal variances
samples are randomly and independently selected

Question 4

we reject the null hypothesis if the f-stat is above or below the f critical value

Answer 4

above

Question 5

when interaction is plotted, what do non intersecting lines mean

Answer 5

no interaction between groups

Question 6

when interaction is plotted, what do intersecting lines mean

Answer 6

interaction between groups

Question 7

How to get interaction plot excel

Answer 7

Make table of mean values

Insert - 2d line chart

Question 8

How to do levene test of means/variances excel

Answer 8

Absolute difference between values and median (for variance) or mean (for mean)
Make table with absolute differences
Perform single factor anova on this table