1. Ungraded quiz
Unit 3

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. Which of the following statement about data visualization is false?
Both EDA and data mining heavily utilize data visualization.
Static graphs are not useful in exploratory data visualization.
Data visualization is about data reeducation and thus the analyst should always produce a highly parsimonious depiction of the data.
In data visualization, the graphical type, the research goal, and the data structure should fit each other.

4. What is the major difference between computer graphics and data visualization?
Usually computer graphic designers illustrate an known subject matter but data visualizer do not know what the final graph looks like until the exploration is finished.
Usually computer graphics aim to impress the audience by fancy graphs but data visualizers might use simple graphs to present useful information.
Both B & C.

5. Which of the following statements is true?
R. A. Fisher downplayed the value of statistical graphs by saying that diagrams prove nothing.
Anscombe showed that different data sets could procedure the same statistics.
Both earlier data visualizers, such as Charles Minard and John Snow, used quasi-GIS methods for illustration or data analysis.
General Motors accepted Edwards Deming’s advice on total quality management.

6. Which of the following statement is untrue (Choose the best answer)?
Data visualization is data reduction only.
Data visualizers goes back and forth between noise and smooth presentations.
There is no single best approach in DV. It depends on whether the graphical format, the research goal, and the data type are in alignment.

7. Which graphical format allows you to see the density of the data?
Scatterplot
Median smoothing box-plot
Image plot
All of the above

8. Which graphical format allows you to compare group difference?
Scatterplot
Diamond plot
Image plot
All of the above

9. Which graphical format allows you to visualize the result of Chi-square analysis?
Scatterplot
Mosaic plot
Dot plot
B & C