A data analyst creates a scatter plot to visualize the relationship between advertising spend (x-axis) and monthly revenue (y-axis) for a small business. Most points form a clear upward trend from the bottom-left to the top-right, but there is one point in the top-left corner representing a month with very high advertising spend but low revenue. How should the analyst interpret this point?

It indicates that the relationship between advertising and revenue is negative.

It should be removed immediately because it is an outlier, without further analysis.

It is an outlier that may represent a special event, such as an ineffective campaign or data error, and it should be investigated.

It is a typical data point that confirms the positive relationship between advertising and revenue.

What does kurtosis measure in a distribution?

The central tendency of the data

The symmetry of the distribution

The spread of the middle 50% of the data

The tailedness or peakedness of the distribution

Python InstitutePCAD - Certified Associate in Data Analytics with Python

Domain 3Objective 1

Descriptive Statistics PCAD-31 Practice Questions (Page 2)

Part of the Statistical Analysis domain, which accounts for 8.3% of the PCAD-31 exam. Python Institute does not publish an official question count, but from its 60-minute exam (~25–40 total, ~2–2 in this domain), expect 1–1 from this objective — we provide 14 practice questions to prepare you well beyond it. (estimate)

14questions here

3free pages

7concepts

8.3%of the exam

Questions 6–10

6foundation · easy
A distribution has a skewness value of -2.5. How is its shape best described?
Select an answer first
7application · medium
A data analyst creates a scatter plot to visualize the relationship between advertising spend (x-axis) and monthly revenue (y-axis) for a small business. Most points form a clear upward trend from the bottom-left to the top-right, but there is one point in the top-left corner representing a month with very high advertising spend but low revenue. How should the analyst interpret this point?
Select an answer first
8foundation · easy
What does kurtosis measure in a distribution?
Select an answer first
9foundation · easy
What is the range of the Pearson correlation coefficient?
Select an answer first
10foundation · easy
In a scatter plot, what does a cluster of points that slopes upward from left to right typically indicate?
Select an answer first

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Descriptive Statistics PCAD-31 Practice Questions (Page 2)

Questions 6–10

A distribution has a skewness value of -2.5. How is its shape best described?

What does kurtosis measure in a distribution?

What is the range of the Pearson correlation coefficient?

In a scatter plot, what does a cluster of points that slopes upward from left to right typically indicate?

Keep studying — Statistical Analysis