data visualization with python final exam answers

Introduction to Data Visualization Tools

1. Data visualizations are used to (check all that apply):

  • train and test a machine learning algorithm.
  • perform data analytics and build predictive models.
  • support recommendations to different stakeholders.
  • share unbiased representation of data.
  • explore a given dataset.

2. The three layers that make up the _________ architecture are the backend, the artist, and the scripting layers.

  • Matlab
  • Matplotlib
  • Seaborn
  • Pyplot

3. Which of the following codes uses the scripting layer to create a stacked area plot of the data in the pandas dataframe, area_df?

  • ax = area_df.plot(kind=’area’, figsize=(20, 10)) ax.title(‘Plot Title’) ax.ylabel(‘Vertical Axis Label’) ax.xlabel(‘Horizontal Axis Label’)
  • ax = area_df.plot(type=’area’, figsize=(20, 10)) ax.set_title(‘Plot Title’) ax.set_ylabel(‘Vertical Axis Label’) ax.set_xlabel(‘Horizontal Axis Label’)
  • import matplotlib.pyplot as plt area_df.plot(kind=’area’, figsize=(20, 10)) plt.title(‘Plot Title’) plt.ylabel(‘Vertical Axis Label’) plt.xlabel(‘Horizontal Axis Label’)
  • None of the above

4. The following code will create a stacked area plot of the data in the pandas dataframe, area_df, with a transparency value of 0.35?

import matplotlib.pyplot as plt transparency = 0.35 area_df.plot(kind='area', alpha=transparency, figsize=(20, 10)) plt.title('Plot Title') plt.ylabel('Vertical Axis Label') plt.xlabel('Horizontal Axis Label')

  • True
  • False

5. Pie charts are less confusing than bar charts and should be your first attempt when creating a visual.

  • False
  • True

6. A ___________ is a variation of the scatter plot that displays three dimensions of data.

  • Bubble plot
  • Scatter map
  • Bar chart
  • Heatmap

7. A waffle chart is great way to visualize data in relation to a whole, or to do what?

  • Highlight progress against a given threshold.
  • Summarize a set of data measured on an interval scale.
  • Identify variables that have an impact on a topic of interest.
  • Show frequency or importance.

8. What is a depiction of the meaningful words in some textual data, where the more a specific word appears in the text, the bigger and bolder it appears?

  • A Regression Plot
  • A Word Cloud
  • A Waffle Chart
  • A Box Plot

9. Which of the following is NOT a tile style of Folium maps?

  • Stamen Terrain
  • OpenStreetMap
  • Stamen Toner
  • River Coastal

10. What is the correct tile style for Folium maps that feature hill shading and natural vegetation colors?

  • Stamen Watercolor
  • Stamen Terrain
  • OpenStreetMap
  • Mapbox Bright

11. Which of the following statements is true for Plotly?

  • An interactive, open-source plotting library.
  • All of the above
  • Includes chart types like statistical, financial, maps, scientific, and 3-dimensional.
  • Supports over 40 unique chart types.

12. Dash components are

  • Core
  • HTML
  • CSS
  • Both  a and b
  • a only

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