Ungraded quiz Unit 4

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

When there are too many variables, what problem do we face? Over-plotting Curse of dimensionality Bandwidth Bandheight

When there are too many data, what problem do we face? Over-plotting Curse of dimensionality Bandwidth Bandheight

When there is one variable, which graphing format is the best? Pie chart Donut chart Bar chart All are good

When the frequency count is partitioned by two grouping variables, which graphing format is the best? Side by side bar chart Stacked bar chart Slopegraph or parallel coordinate plot All are good

When there is one continuous variable and the data range is very wide, which graphing method is the best? Histogram only. Density smoothing only. Superimpose a density smoother on a histogram.

When there is a continuous variable and a grouping factor, which graphing method should be used? Two histograms Pyramid graph Superimpose a violin plot on a boxplot All are good but B and C are better than A

What information can a violin plot provide? Distributional information Quantile information Two-dimensional contour lines A and B

Which of the following statement is true? The heat map shows the density of the data by contour lines. The nonparametric density shows the concentration of the data by colors only. The nonparametric density shows the concentration of the data by colors and contour lines.