Deck 10: Comparing Means of More Than Two Groups

Question 1

After you run an ANOVA you find levene's statistics is .08. From this you will assume that the group ________________ is ____________________.

A) variance; not significantly different
B) variance; significantly different
C) central tendency; not significantly different
D) central tendency; significantly different

Answer 1

A

Question 2

A ________________ is used to compare the means of two independent groups.

A) independent t-test
B) paired samples t-test
C) one-way ANOVA
D) repeated measures ANOVA

Answer 2

A

Question 3

Repeating a t-test multiple times to compare more than two groups results in raising the chance of a ____________________.

A) type I error
B) type II error
C) type III error
D) type IV error

Answer 3

A

Question 4

A group of researchers is interested in if there is a statistically significant difference in the average number of clients served in four different departments. To answer this question, what type of ANOVA should they use?

A) Factorial ANOVA
B) Mixed design ANOVA
C) One-way ANOVA
D) Repeated measures ANOVA

Question 5

The ANOVA is known as a(n) _____________________ because it only indicates whether or not there is a significant difference between the groups, not between which groups the difference lies.

A) post-hoc test
B) beta test
C) alpha test
D) omnibus test

Question 6

An assumption of the ___________________ is that the observations are independent of one another.

A) one-way ANOVA
B) paired samples t-test
C) paired samples ANOVA
D) repeated measures ANOVA

Question 7

A researcher conducts an ANOVA and finds a significant result, what should be done next?

A) post-hoc test
B) beta test
C) alpha test
D) omnibus test

Question 8

After Jim runs his ANOVA he finds that station 3 is significantly different from station 5. He then looks at the ______________ for each station to determine which station has significantly faster response times.

A) F-statistic
B) t-statistic
C) mean response time
D) eta square

Question 9

What statistic does an ANOVA produce?

A) t-statistic
B) ANOVA value
C) F-statistic
D) t-value

Question 10

For Jim's case, one of his hypotheses is: Station 1 mean response time=Station 2 mean response time= (etc.) = Station 8 mean response time. This is considered his ____________ hypothesis.

A) null
B) research
C) working
D) alternative

Question 11

_______________________ is used when you are comparing more than two related groups.

A) Factorial ANOVA
B) Mixed design ANOVA
C) One-way ANOVA
D) Repeated measures ANOVA

Question 12

In Emily's case she will be utilizing a ____________________ to evaluate the difference in cultural competence between departments.

A) repeated-measures ANOVA
B) one-way ANOVA
C) independent t-test
D) paired samples t-test

Question 13

The dependent variable in a repeated measure ANOVA is what type of variable?

A) grouping
B) continuous
C) ordinal
D) nominal

Question 14

A _________________ is used when the researcher is interested in the effect of one or more grouping variables on one or more repeated measures.

A) Factorial ANOVA
B) Mixed design ANOVA
C) One-way ANOVA
D) Repeated measures ANOVA

Question 15

What is the minimum recommended number of cases for each group in ANOVA?

A) 45
B) 15
C) 30
D) 5

Question 16

Regardless of which ANOVA test is performed, there is an assumption that the data is __________________.

A) leptokurtic
B) normally distributed
C) platykurtic
D) skewed

Question 17

___________________ is calculated as the between sum of squares divided by the combined between sum of squares and the within sum of squares.

A) degrees freedom
B) t-statistic
C) eta square
D) F-statistic

Question 18

A graduate student is interested how her numerical grade is impacted based on in which department she is taking the course and the gender of the professor. What type of ANOVA would she have to run to answer this question?

A) Factorial ANOVA
B) Mixed design ANOVA
C) One-way ANOVA
D) Repeated measures ANOVA

Question 19

_______________________ is an indicator of magnitude of difference between groups.

A) effect size
B) p-value
C) F-statistic
D) significance

Question 20

Classroom A scores an average of 89 on an exam, classroom B scores an average of 85 on the exam, and classroom C scores an average of 94 on the exam. You run an ANOVA test and find a p-value of .50. What is the next step you would take?

A) Run a post-hoc test
B) Reject the null hypothesis
C) Reject the research hypothesis
D) Determine the F-statistic

Question 21

In ANOVA, a small sample size increases the likelihood of violating the homogeneity of variance assumption.

Question 22

If the F-statistic ratio produces a result of _________________, then the variability due to the within group differences and the variability due to the between group differences are the same.

A) 0
B) 1
C) 2
D) 3

Question 23

Calculating the variability between groups for the F-statistic is based on the comparison of the mean of each group.

Question 24

An effect size of .21 would be considered a(n) ________________ effect size.

A) small
B) medium
C) large
D) insignificant

Question 25

Jim will be using a one-way ANOVA to compare the response time during the years 2009, 2010, and 2011.

Question 26

From the ANOVA one can determine between which groups there is a difference.

Question 27

A significance test indicates the degree of difference between two groups.

Question 28

The within-group sum of squares is the difference between the mean of all scores and the mean of each group's score, squared

Question 29

What is the purpose of using an ANOVA analysis?

Question 30

The Bonferroni approach and LSD approach are examples of post hoc tests.

Question 31

A(n) ____________________ is needed to determine between which groups there is a significant difference.

A) post-hoc test
B) beta test
C) alpha test
D) omnibus test

Question 32

What does the p-value and effect size tell you about the hypothesized relationship?

Question 33

The null hypothesis in ANOVA is that the mean of the samples are not equal.

Question 34

If your research includes more than two groups and you perform multiple t-tests rather than an ANOVA, there is a chance of _________________.

A) alpha inflation
B) beta inflation
C) sampling error
D) sample error
True/False

Question 35

df is the symbol for deviance of freedom.

Question 36

What is the difference between a one-way ANOVA and a repeated measures ANOVA?

Question 37

A post-hoc test is used to determine which specific groups are different from one another once the ANOVA is shown to be significant.

Question 38

The __________________ is a ratio of the amount of variability between groups compared to the amount of variability within each group.

A) t-statistic
B) ANOVA value
C) F-statistic
D) t-value