Lecture 15

Question 1

What is a completely randomized design? (CRD)

Answer 1

Individuals are assigned at random to each treatment (factors) so that all individuals are independent

Question 2

What is a randomized block design (RBD)

Answer 2

When one individual in each treatment is related to one particular individual in each of the other treatments

Question 3

What is the two-factor ANOVA randomized block a multiple-sample extension of?

Answer 3

Paired sample t-test because the blocks are what pair the samples

Question 4

What is a Model III ANOVA?

Answer 4

(Mixed-model) where one factor is fixed and the other is random

Question 5

In a Model III ANOVA, which of the factors is fixed?

Answer 5

The factor of general interest

Question 6

In a two-factor ANOVA, what is variation due to?

Answer 6

The total variation, the error variation, and the fixed factor variation (the factor of interest)

Question 7

What is the purpose of randomly blocking in a two-factor ANOVA with randomized blocks?

Answer 7

To pair the individuals in the sample with treatments and to minimize error that would have gone into the unexplained variation