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- 1. Multiple Choice
Knowledge on Exploratory Data Analysis is contributed by whom?
- 2. Multiple Choice
What is exploratory data analysis?
A rigid framework by which we analyze data
An initial way by which we can get a feel for data
A type of purely quantitative method of data analysis
A set of scientific principles for analyzing data in a categorical manner
- 3. Multiple Choice
Most often, EDA relies on _____.
visual techniques
assumptions
fixed models
testing for statistical significance
- 4. Multiple Choice
Which of the following is a principle of analytic graphics?
Don't plot more than two variables at at time
Only do what your tools allow you to do
Show box plots (univariate summaries)
Integrate multiple modes of evidence
- 5. Multiple Choice
What is the role of exploratory graphs in data analysis?
They are typically made very quickly.
They are made for formal presentations.
Only a few are constructed.
xes, legends, and other details are clean and exactly detailed.
- 6. Multiple Choice
Which of the following is true about the base plotting system?
The system is most useful for conditioning plots.
Plots are created and annotated with separate functions.
Plots are typically created with a single function call.
Margins and spacings are adjusted automatically depending on the type of plot and the data.
- 7. Multiple Choice
Which of the following is an example of a valid graphics device in R?
The computer screen
A Microsoft Word document
A file folder
A png file
- 8. Multiple Choice
Bitmapped file formats can be most useful for
Plots that require animation or interactivity
Scatterplots with many many points
Plots that may need to be resized
Plots that are not scaled to a specific resolution
- 9. Multiple Choice
Which of the following functions is typically used to add elements to a plot in the base graphics system?
hist()
plot()
text()
boxplot()
- 10. Multiple Choice
If I want to save a plot to a PDF file, which of the following is a correct way of doing that?
Construct the plot on the PNG device with png(), then copy it to a PDF with dev.copy2pdf().
Construct the plot on the screen device and then copy it to a PDF file with dev.copy2pdf()
Open the screen device with quartz(), construct the plot, and then close the device with dev.off().
Open the PostScript device with postscript(), construct the plot, then close the device with dev.off().
- 11. Multiple Choice
With reference to the EDA boxplot shown, the median is represented by which feature?
Number 2
Number 3
Number 4
Number 5
- 12. Multiple Choice
With reference to the EDA boxplot shown, an outlier is represented by feature:
Number 1
Number 2
Number 3
Number 4
- 13. Multiple Choice
With reference to the EDA boxplot shown, an extreme score is represented by feature:
Number 1
Number 2
Number 3
Number 4
- 14. Multiple Choice
With reference to the EDA boxplot shown, the top of the box labelled 4 is:
The 25th percentile
The 50th percentile
The 75th percentile
The mean
- 15. Multiple Choice
A histogram is
Is a bar chart.
Is a graphic representation of the frequency distribution of a qualitative or categorical variable.
Is a graphic representation of the frequency distribution of a continuous variable.
Is an alternative to a pie chart.
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