Stats 2 Midterm Review - Spring 2018

Question 1

Takes cases as individual clusters and then merges cases together until one cluster is left.

Accepted Answer

Hierarchical cluster

Question 2

An HR specialist clusters data which seem to represent “low”, “middle”, and “high” performers.

Accepted Answer

Run an ANOVA using performance appraisal scores

Question 3

Which of the following is a way of assessing multivariate normality?

Accepted Answer

Malahanobis distance

Question 4

Which of the following plots tells you how many clusters you might have?

Accepted Answer

Dendrogram, Scree plot of agglomeration coefficients

Question 5

Look at the following dendrogram and determine how many clusters the data might fit into.

Accepted Answer

3, 2

Question 6

Along which function do 1st years separate from 2nd and 3rd years?

Accepted Answer

Function 1

Question 7

What is this plot called?

Accepted Answer

Icicle plot

Question 8

Which method should you use for your hierarchical cluster in this class?

Accepted Answer

Ward's method

Question 9

A researcher collects several measures of well-being, but they are found to be uncorrelated.

Accepted Answer

Separate ANOVAs

Question 10

Why can’t someone just run multiple ANOVAs instead of a MANOVA?

Accepted Answer

Running multiple ANOVAs inflates Type 1 error

Question 11

How do you determine if a Mahalanobis distance value corresponds with a significant outlier?

Accepted Answer

Compare the value to a chi-square critical value

Question 12

If your Box’s M test comes up significant, which of these tests do you report in a MANOVA?

Accepted Answer

Pillai's trace

Question 13

In MANOVA, which of the following procedures assesses individual independent variables?

Accepted Answer

LMatrix, Pairwise comparisons using EMmeans

Question 14

How should you determine the order of testing DVs in the Roy-Bargmann stepdown analysis?

Accepted Answer

Rank from most to least important based on prior theory

Question 15

What is the effect size of Function 2?

Accepted Answer

.85

Question 16

How do you assess if your hierarchical and k-means cluster solutions agree with each other?

Accepted Answer

Crosstab the cluster membership from each method

Question 17

Interpret the following output. Which functions are significant?

Accepted Answer

Function 1 and 2 combined

Question 18

What follow-up test can you run to assess the dependent variables of a MANOVA?

Accepted Answer

Roy-Bargmann stepdown analysis, DFA

Question 19

Following up MANOVA by running a series of ANCOVAs is called...

Accepted Answer

Roy-Bargmann stepdown analysis

Question 20

Which of the following is true regarding DFA and cluster analysis?

Accepted Answer

Cluster is more exploratory; DFA is used to confirm MANOVA

Question 21

Which one of these is NOT true about Lmatrix and EMmeans?

Accepted Answer

EMMeans cannot examine simple effects

Question 22

Which type of plot can help you assess the results of a hierarchical cluster?

Accepted Answer

Dendrogram, Scree plot of agglomeration schedule coefficients

Question 23

The McNemar and McNemar-Bowker tests are tests of…

Accepted Answer

Dissimilarity

Question 24

What does it mean to “externally validate” cluster solutions?

Accepted Answer

Run membership as an IV against theory-related variables

Question 25

Which of these do you plot as a bar graph to help you name/describe clusters?

Accepted Answer

Final cluster centers

Question 26

I run a study assessing three types of therapy on multiple measures of mental health. Test?

Accepted Answer

MANOVA

Question 27

Which of the following is the typical procedure to validate a potential cluster solution?

Accepted Answer

Hierarchical cluster first, then specified k-means

Question 28

Which of the following is NOT an assumption of ANCOVA?

Accepted Answer

No multivariate outliers

Question 29

To assess homogeneity of regression slopes, which of these terms does NOT need to be included?

Accepted Answer

IV*IV*CV

Question 30

If my classification results correctly classify 43% of cases, did I meet minimum accuracy?

Accepted Answer

no

Question 31

In DFA, which of the following is used to determine the relative importance of each variable?

Accepted Answer

Structure matrix

Question 32

Which of the following is a correct description of MANOVA?

Accepted Answer

Effects of IVs on a linear combination of DVs

Stats 2 Midterm Review - Spring 2018

Questions 32

Stats 2 Midterm Review - Spring 2018

Questions 32