1. Ungraded quiz
Unit 5

2. Show me your fingers
Do not shout out the answer, or your classmates will follow what you said.
Use your fingers
One finger (the right finger) = A
Two fingers = B
Three fingers = C
Four fingers = D
No finger = I don’t know. I didn’t study

3. When there are too many variables, what can be done?
Use principal component analysis to combine variables into a few composite scores
Use stepwise regression to toss out unwanted variables
Use predictor screening to toss out unwanted variables
All of the above

4. Coplot can be implemented in _____
JMP
Tableau
Both

5. Which of the following statements is true? In Tableau
Dimensions are continuous variables and Measures are ordinal.
Dimensions are categorical and Measures are ordinal.
Dimensions are categorical and Measures are continuous.
Both Dimensions and Measures can accept any data type.

6. He should use Mahalanobis distance or/and normal contour ellipsoids.
Dr. April Fu used a boxplot and a 95% density eclipse to detect and remove outliers. And then he ran a multivariate analysis with 4 variables. Which of the following statements is true?
Using a box plot is inappropriate because this method is for detecting one-dimensional outlier.
Using a density eclipse is inappropriate because this method is for detecting bivariate outlier.
He should use Mahalanobis distance or/and normal contour ellipsoids.
All of the above

7. Which of the following graphs can be used for clustering of a 3-dimensional data set?
Scatterplot matrix
Coplot
Terney plot
All of the above

8. I want to include a graph into a poster presentation
I want to include a graph into a poster presentation. The graph size will be 20 X 30. Which graphical format should I use?
JPEG
PNG
GIF
Vector-based image

9. I want to find out what is the optimal combination of various conditions to obtain the desirable outcome. Which visualization method should I use?
Linking and brushing
Color map
Prediction profiler
Mesh surface

10. I used Mathematica to create a movie showing 4 dimensions
I used Mathematica to create a movie showing 4 dimensions. When I played the movie, the change from one frame to the next is almost unnoticeable. What is happening?
You didn’t pay the software license
Your computer microprocessor is not powerful enough to display the animation.
There is no 4-way interaction.