Enroll Here: Data Visualization with Python Cognitive Class Exam Quiz Answers
Data Visualization with Python Cognitive Class Certificate Answers
Module 1 – Introduction to Visualization Tools Quiz Answers – Cognitive Class
Question 1: What are the layers that make up the Matplotlib architecture?
- FigureCanvas Layer, Renderer Layer, and Artist Layer.
- Backend_Bases Layer, Artist Layer, Scripting Layer.
- Backend Layer, Artist Layer, and Scripting Layer.
- Backend Layer, FigureCanvas Layer, Renderer Layer, Artist Layer, and Scripting Layer.
- Figure Layer, Artist Layer, and Scripting Layer.
Question 2: Using the inline backend, you can modify a figure after it is rendered.
- False
- True
Question 3: Which of the following are examples of Matplotlib magic functions? Choose all that apply.
- %matplotlib inline
- #matplotlib notebook
- $matplotlib outline
- %matplotlib notebook
- #matplotlib inline
Module 2 – Basic Visualization Tools Quiz Answers – Cognitive Class
Question 1: Area plots are stacked by default.
- False
- True
Question 2: Given a pandas series, series_data, which of the following will create a histogram of series_data and align the bin edges with the horizontal tick marks?
- count, bin_edges = np.histogram(series_data)
- series_data.plot(kind=’hist’, xticks = count, bin_edges)
- count, bin_edges = np.histogram(series_data)
- series_data.plot(kind=’hist’, xticks = count)
- count, bin_edges = np.histogram(series_data)
- series_data.plot(kind=’hist’, xticks = bin_edges)
- series_data.plot(kind=’hist’)
- count, bin_edges = np.histogram(series_data)
- series_data.plot(type=’hist’, xticks = bin_edges)
Question 3: Given a pandas dataframe, question, which of the following will create a horizontal barchart of the data in question?
- question.plot(type=’bar’, rot=90)
- question.plot(kind=’bar’, orientation=’horizontal’)
- question.plot(kind=’barh’)
- question.plot(kind=’bar’)
- question.plot(kind=’bar’, type=’horizontal’)
Module 3 – Specialized Visualization Tools Quiz Answers – Cognitive Class
Question 1: Pie charts are less confusing than bar charts and should be your first attempt when creating a visual.
- False
- True
Question 2: What do the letters in the box plot above represent?
- A = Mean, B = Upper Mean Quartile, C = Lower Mean Quartile, D = Inter Quartile Range, E = Minimum, and F = Outliers
- A = Mean, B = Third Quartile, C = First Quartile, D = Inter Quartile Range, E = Minimum, and F = Outliers
- A = Median, B = Third Quartile, C = First Quartile, D = Inter Quartile Range, E = Minimum, and F = Outliers
- A = Median, B = Third Quartile, C = Mean, D = Inter Quartile Range, E = Lower Quartile, and F = Outliers
- A = Mean, B = Third Quartile, C = First Quartile, D = Inter Quartile Range, E = Minimum, and F = Maximum
Question 3: What is the correct combination of function and parameter to create a box plot in Matplotlib?
- Function = box, and Parameter = type, with value = “plot”
- Function = boxplot, and Parameter = type, with value = “plot”
- Function = plot, and Parameter = type, with value = “box”
- Function = plot, and Parameter = kind, with value = “boxplot”
- Function = plot, and Parameter = kind, with value = “box”
Module 4 – Advanced Visualization Tools Quiz Answers – Cognitive Class
Question 1: Which of the choices below will create the following regression line plot, given a pandas dataframe, data_dataframe?
- import seaborn as sns
- ax = sns.regplot(x=”year”, y=”total”, data=data_dataframe, color=”green”)
- data_dataframe.plot(kind=”regression”, color=”green”, marker=”+”)
- import seaborn as sns
- ax = sns.regplot(x=”year”, y=”total”, data=data_dataframe, color=”green”, marker=”+”)
- data_dataframe.plot(kind=”regplot”, color=”green”, marker=”+”)
- import seaborn as sns
- ax = sns.regplot(x=”total”, y=”year”, data=data_dataframe, color=”green”)
Question 2: In Python, creating a waffle chart is straightforward since we can easily create one using the scripting layer of Matplotlib.
- False
- True
Question 3: A word cloud (choose all that apply)
- is a depiction of the frequency of different words in some textual data.
- is a depiction of the frequency of the stopwords, such as a, the, and, in some textual data.
- is a depiction of the meaningful words in some textual data, where the more a specific word appears in the text, bigger and bolder it appears in the word cloud.
- can be generated in Python using the word_cloud library that was developed by Andreas Mueller.
- can be easily created using Matplotlib using the scripting layer.
Module 5 – Creating Maps and Visualizing Geospatial Data Quiz Answers – Cognitive Class
Question 1: What tile style of Folium maps is usefule for data mashups and exploring river meanders and coastal zones?
- OpenStreetMap
- Mapbox Bright
- Stamen Toner
- Stamen Terrain
- River and Coastal
Question 2: You cluster markers superimposed onto a map in Folium using a feature group object.
- False
- True
Question 3: If you know that the latitude of Spain is 40.4637° N and its longitude is 3.7492° W, and you are interested in generating a map of Spain to visualize its hill shading and natural vegetation. Which of the following lines of code will create the right map for you?
- folium.Map(location=[40.4637, 3.7492], zoom_start=6, tiles=’Stamen Toner’)
- folium.Map(location=[40.4637, 3.7492], zoom_start=6, tiles=’Stamen Terrain’)
- folium.Map(location=[40.4637, -3.7492], zoom_start=6, tiles=’Stamen Terrain’)
- folium.Map(location=[-40.4637, -3.7492], zoom_start=6, tiles=’Stamen Terrain’)
- folium.Map(location=[40.4637, 3.7492], zoom_start=6)
Data Visualization with Python Final Exam Answers – Cognitive Class
Question 1: Data visualizations are used to (check all that apply):
- explore a given dataset.
- perform data analytics and build predictive models.
- train and test a machine learning algorithm.
- share unbiased representation of data.
- support recommendations to different stakeholders.
Question 2: Matplotlib was created by John Hunter, an American neurobiologist, and was originally developed as an EEG/ECoG visualization tool.
- False
- True
Question 3: One type of Artist object is the primitive type. Which of the following are examples of the primitive type? Check all that apply.
- Rectangle
- Figure
- Axes
- Circle
- Text
Question 4: Using the notebook backend, you can modify a figure after it is rendered.
- False
- True
Question 5: The scripting layer is (check all that apply):
- comprised mainly of pyplot.
- an area on which the figure is drawn.
- a handler of user inputs such as keyboard strokes and mouse clicks.
- lighter that the Artist layer, and is intended for scientists whose goal is to perform quick exploratory analysis.
- comprised one one main object – Artist.
Question 6: Which of the following are instances of the Artist object? Check all that apply.
- Titles
- Event
- FigureCanvas
- Tick Labels
- Images
Question 7: There are three types of Artist objects.
- False
- True
Question 8: Each primitive artist may contain other composite artists as well as primitive artists.
- False
- True
Question 9: Given a pandas dataframe, question, which of the following will create an unstacked area plot of the data in question?
- question.plot(type=’area’, stacked=False)
- question.plot(kind=’area’, unstacked=True)
- question.plot(kind=’area’, stacked=False)
- question.plot(kind=’area’)
- question.plot(type=’area’, unstacked=True)
Question 10: Pie charts are relevant only in the rarest of circumstances, and bar charts are far superior ways to quickly get a message across.
- False
- True
Question 11: What is the correct function, parameter and value input for creating a pie chart in Matplotlib?
- Function = plot, parameter = kind, value = “pie”
- Function = pie, parameter = type, value = “plot”
- Function = plot, parameter = type, value = “pie”
- Function = pie, parameter = kind, value = “plot”
Question 12: What are the five main dimensions of a box plot? Select all that apply.
- Minimum
- Standard Deviation
- Maximum
- First Quartile
- Third Quartile
- Median
- Skewness
Question 13: Which of the lines of code below will create the following scatter plot, given the pandas dataframe, df_total?
- import matplotlib.pyplot as plt
- plot(kind=’scatter’, x=’year’, y=’total’, data=df_total)
- plt.title(‘Total Immigrant population to Canada from 1980 – 2013’)
- plt.label (‘Year’)
- plt.label(‘Number of Immigrants’)
- import matplotlib.pyplot as plt
- df_total.plot(type=’scatter’, x=’year’, y=’total’)
- plt.title(‘Total Immigrant population to Canada from 1980 – 2013’)
- plt.label (‘Year’)
- plt.label(‘Number of Immigrants’)
- import matplotlib.pyplot as plt
- df_total.plot(kind=’scatter’, x=’year’, y=’total’)
- plt.title(‘Total Immigrant population to Canada from 1980 – 2013’)
- plt.xlabel (‘Year’)
- plt.ylabel(‘Number of Immigrants’)
- import matplotlib.scripting.pyplot as plt
- df_total.plot(kind=’scatter’, x=’year’, y=’total’)
- plt.title(‘Total Immigrant population to Canada from 1980 – 2013’)
- plt.label (‘Year’)
- plt.label(‘Number of Immigrants’)
- import matplotlib.scripting.pyplot as plt
- df_total.plot(type=’scatter’, y=’year’, x=’total’)
- plt.title(‘Total Immigrant population to Canada from 1980 – 2013’)
- plt.xlabel (‘Year’)
- plt.ylabel(‘Number of Immigrants’)
Question 14: A bubble plot is a variation of the scatter plot that displays three dimensions of data.
- False
- True
Question 15: Seaborn is a Python visualization library that is built on top of Matplotlib.
- False
- True
Question 16: Which of the choices below will create the following regression line plot, given a pandas dataframe, data_dataframe?
- import seaborn as sns
- ax = sns.regplot(x=”year”, y=”total”, data=data_dataframe, color=”green”)
- data_dataframe.plot(kind=”regression”, color=”green”, marker=”+”)
- import seaborn as sns
- ax = sns.regplot(x=”year”, y=”total”, data=data_dataframe, color=”green”, marker=”+”)
- data_dataframe.plot(kind=”regplot”, color=”green”, marker=”+”)
- import seaborn as sns
- ax = sns.regplot(x=”total”, y=”year”, data=data_dataframe, color=”green”)
Question 17: Which of the following can be accomplished with the package word_cloud in Python? Select all that apply.
- Create a word cloud based on the frequency of different words in some textual data.
- Create a bubble plot based on the word cloud.
- Superimpose the words in a word cloud onto the mask of any shape.
- Import default stop words.
Question 18: The following are tile styles of folium maps (choose all that apply).
- Stamen Terrain
- River Coastal
- Stamen Toner
- Mapbox Bright
- Open Stamen
Question 19: You cluster markers superimposed onto a map in Folium using a marker cluster object.
- False
- True
Question 20: If you know that the latitude and the longitude of Spain are 40.4637° N and 3.7492° W, respectively, and you are interested in generating a map of Spain to explore its river meanders and coastal zones. Which of the following lines of code will create the right map for you?
- folium.Map(location=[40.4637, 3.7492], zoom_start=6, tiles=’Stamen Terrain’)
- folium.Map(location=[40.4637, 3.7492], zoom_start=6, tiles=’Stamen Toner’)
- folium.Map(location=[40.4637, -3.7492], zoom_start=6, tiles=’Stamen Toner’)
- folium.Map(location=[-40.4637, -3.7492], zoom_start=6, tiles=’Stamen Terrain’)
- folium.Map(location=[40.4637, 3.7492], zoom_start=6)
Introduction to Data Visualization with Python
Data visualization is a powerful tool for understanding and communicating insights from data. Python offers a rich ecosystem of libraries for creating stunning visualizations. Let’s delve into an introduction to data visualization with Python:
Libraries for Data Visualization in Python:
- Matplotlib: A versatile library for creating static, interactive, and animated visualizations. It provides a MATLAB-like interface and is widely used for basic plotting.
- Seaborn: Built on top of Matplotlib, Seaborn provides a high-level interface for drawing attractive and informative statistical graphics.
- Pandas Visualization: This is a convenience wrapper around Matplotlib that simplifies plotting directly from pandas DataFrames and Series.
- Plotly: Ideal for creating interactive plots and dashboards. It supports a wide range of plot types and offers excellent interactivity.
- Bokeh: Another library for creating interactive visualizations, particularly suited for web browsers. It’s designed for creating interactive and scalable plots.
- Altair: A declarative statistical visualization library in Python, based on the Vega and Vega-Lite visualization grammar. It allows for concise, high-level specification of complex visualizations.