Blatchley Chapter 11 Quiz

.

Use this information to answer questions 1 and 2

A nurse is examining the use of two different anti-depressants in her patients. The pharmaceutical representative informed her that each type of drug has two different types of doses: High and Low.

How many factors are in this experiment?

1

2

3

4

. For each factor, there are how many levels?

1

2

3

4

. Which of the following is true of a two-way ANOVA?

There are two factors, but each factor can have different number of levels.

There are two factors with a total of four levels.

There are at least two levels.

There are at least two factors.

. In the context of conducting an ANOVA, "Sums of Squares" is an abbreviated term for what?

Sums of squared differences

Sums of squared deviations from the mean

Sums of squared variance

Sums of squared deviations around the difference

. Which of the following is the correct procedure to calculate the mean squares within for an ANOVA?

Sums of squares between divided by degrees of freedom within.

Sums of squares between multiply degrees of freedom within.

Sums of squares within multiply degrees of freedom between.

Sums of squares within divided by degrees of freedom within.

.

This is a source table for what statistical procedure?

Using the source table below, answer questions 6 – 10.

Source	df	SS
Between	3	2243.9
Within	46	23372.8
Total	49

One-way ANOVA.

Two-way ANOVA.

Three-way ANOVA.

Not enough information.

. Based on this data, there were _____ participants, and _____ levels in the independent variable

60, 3

50, 3

50, 4

50, 47

. What is the Mean Squares between? (p11, 12, 13)

508

48

2243.9

748

. What is the Mean Squares within?

508

48

2243.9

748

. What is the F-ratio for this study and what is the conclusion if Î± = .05?

F = 1.47, the F statistic is not significant

F = .01, the F statistic is not significant

F = .94, the F statistic is not significant

Insufficient information to calculate the F-ratio.

.

Using this information to respond to questions 11 - 13.

In a study with 30 participants, a researcher examined the effects of self-awareness and task performance. In three groups, she manipulated whether participants were voice recorded, video recorded, and not recorded when performing a verbal task. The mean scores were 89/100, 72/100, and 93/100, respectively. In each condition, there were 10 participants and each participant only experienced one of the three conditions.

In this study, there were ____ factor(s) and ____ level(s)?

1; 2

2; 2

2; 3

1; 3

. df_b is ___ in this study, and df_w is ____?

1; 27

2; 27

0; 28

0; 27

. If the F-value is significant, what is the next step for this study?

t-tests to compare individual means

a Tukey HSD

none; because there are only two conditions

none; because there is only one factor

. Which of the following best describes why post-hoc tests are needed?

there are no other way to test for mean differences

they control for type-I errors

they control for type-II errors

all of the above are true

. Which two elements determine the critical value of the Tukey HSD in a one-way ANOVA?

Number of subjects and F

Number of factors and df_b

Df_b and Df_w

Number of levels and df_w

. Which of the following is false about Tukey HSD?

It is generally used after a one-way ANOVA showed statistical significance.

It requires each condition to have equal n's.

It is a post-hoc analysis that allows researchers to test for mean differences between different levels of a factor.

It controls for type-I error rates due to multiple comparisons.

. In a model that has three factors with 2 levels each, it is a...

two-way ANOVA.

one-way ANOVA.

three-way ANOVA.

six-way ANOVA.

. A one-way ANOVA can have up to how many effects, in total?

One main effect.

Two interactions and two main effects.

Two main effects and one interaction.

One interaction and one main effect.

.

Using this information to respond to questions 19 – 20.

Dr. Jaymar is an emotion researcher. He primes (i.e., makes participants think about) participants with either happy or sad emotions and also manipulates the type of environment and provides either a stressful or not stressful environment to his participants. He recruits 60 participants and divides them evenly into his different conditions to examine their preferences in romantic partners.

How is the design best described?

This is a 2x3 ANOVA with four conditions.

This is a two-way ANOVA, with four conditions.

This is a one-way ANOVA with four conditions.

This is a one-way ANOVA with two conditions.

. Which of the following would represent an interaction effect?

The effect of environment type on an preference depends partly the type of emotion that was primed

Environment type affects priming

Both effects influence preference

All of the above are examples of interactions

.

In the graph below, it is likely that...

Click on the link for Question 21 Graph

There is a main effect of drug dose and counseling

There is an interaction and one main effect

There is only one main effect

There are no effects

. In a 2 x 3 ANOVA, how many tests of main effects are there?

6

3

2

1

. How many effects are being tested in this ANOVA?

1

2

3

4

. Based on this source table, how many subjects were in the study, assuming equal number of subjects in each condition?

30

33

39

32

. If there are significant effects in an ANOVA such as this one, which of the following is true?

Tukey HSD should be conducted next

T-tests should be conducted next

Nothing is necessary after

A one-way ANOVA

Blatchley Chapter 11 Quiz

Quiz Content