Which technique is commonly used to reduce overplotting in a scatter plot with many overlapping points?

Setting the alpha parameter to a value less than 1

A data analyst wants to create a scatter plot with a regression line to show the relationship between two continuous variables, and they want to use Seaborn. Which function is most appropriate?

sns.regplot(x='age', y='income', data=df)

sns.displot(x='age', y='income', data=df)

sns.catplot(x='age', y='income', data=df)

sns.lineplot(x='age', y='income', data=df)

A data analyst is comparing the distribution of test scores for three different teaching methods. The dataset has 500 students per method. The analyst wants to show the median, quartiles, and potential outliers for each method in a single plot. Which chart type is most appropriate?

A scatter plot of method vs. score

A box plot (using Seaborn's catplot with kind='box')

A histogram of all scores combined

A line chart showing the mean score for each method

Python InstitutePCAD - Certified Associate in Data Analytics with Python

Domain 5Objective 1

Data Visualization Techniques PCAD-31 Practice Questions (Page 3)

Part of the Data Communication and Visualization domain, which accounts for 10.4% of the PCAD-31 exam. Python Institute does not publish an official question count, but from its 60-minute exam (~25–40 total, ~3–3 in this domain), expect 2–2 from this objective — we provide 39 practice questions to prepare you well beyond it. (estimate)

39questions here

8free pages

12concepts

10.4%of the exam

Questions 11–15

11foundation · easy
Which technique is commonly used to reduce overplotting in a scatter plot with many overlapping points?
Select an answer first
12application · medium
A data analyst wants to create a scatter plot with a regression line to show the relationship between two continuous variables, and they want to use Seaborn. Which function is most appropriate?
Select an answer first
13expert · medium
A data analyst is comparing the distribution of test scores for three different teaching methods. The dataset has 500 students per method. The analyst wants to show the median, quartiles, and potential outliers for each method in a single plot. Which chart type is most appropriate?
Select an answer first
14foundation · easy
In Matplotlib, which parameter of plt.plot() controls the color of the line?
Select an answer first
15foundation · easy
Which Matplotlib function adds a title to the current plot?
Select an answer first

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Data Visualization Techniques PCAD-31 Practice Questions (Page 3)

Questions 11–15

Which technique is commonly used to reduce overplotting in a scatter plot with many overlapping points?

A data analyst wants to create a scatter plot with a regression line to show the relationship between two continuous variables, and they want to use Seaborn. Which function is most appropriate?

A data analyst is comparing the distribution of test scores for three different teaching methods. The dataset has 500 students per method. The analyst wants to show the median, quartiles, and potential outliers for each method in a single plot. Which chart type is most appropriate?

In Matplotlib, which parameter of plt.plot() controls the color of the line?

Which Matplotlib function adds a title to the current plot?

Keep studying — Data Communication and Visualization