Lesson 7

Question 1

Who came up with ANOVA tests?

Answer 1

Ronald Fisher when working with tea.

Question 2

Why are ANOVA tests used?

Answer 2

Allows us to test hypotheses of a quality of an infinite number of means while maintaining a type 1 error rate at a alpha of 0.05

Question 3

What are the 4 assumptions when working with ANOVA tests?

Answer 3

1) Dependent V is continuous.
2) DV is normally distributed.
3) Homogeneity of variance.
4) Each score is sampled randomly and independently.

Question 4

What is a One-Way ANOVA?

Answer 4

Allow us to examine the differences on one IV on 1 continuous DV.

Question 5

What are the 2 parts of variation within a ANOVA?

Answer 5

1) Variation within each group.

2) Variation between groups.

Question 6

What does ‘k’ represent when calculating df?

Answer 6

k = the number of conditions/groups.

Question 7

How do you calculate dfwithin?

Answer 7

N-k

Question 8

When your Fobt is greater or equal to Fcrit then…

Answer 8

You can reject your null hypothesis.

Question 9

When do you do a post-hoc? Why?

Answer 9

Do it when you reject your null hypothesis and to determine where those significant differences lie.

Question 10

What categorizes as a medium practical significance in ANOVA tests?

Answer 10

a np squared value of around 0.25

Question 11

What values do you subtract in a post-hoc?

Answer 11

All pairs - all numbers of absolute and cannot be negative.