A data scientist is studying the joint distribution of 'age' and 'blood_pressure' for 500 patients. They want to see if there is a relationship and also check for any clusters. Which visualization is most appropriate?

A box plot of blood pressure only.

A scatter plot of age vs. blood pressure.

An analyst is examining a single numerical variable 'response_time' from a web server log. The histogram shows a concentration of values near 50 ms, but there are a few isolated bars far to the right near 5000 ms. Which visualization and follow-up action is most appropriate?

Use a scatter plot against time to see the distribution of response times.

Use a box plot to confirm the presence of outliers beyond the upper whisker, then investigate those extreme response times.

Remove the extreme values immediately because they are clearly errors.

Use a heatmap to show the density of response times across the day.

CertNexusCertified Data Science Practitioner (CDSP)

Domain 3Objective 1

Objective 3.1 Examine Data CERTIFIED-DATA-SCIENCE-PRACTITIONER Practice Questions (Page 3)

Part of the 3.0 Performing exploratory data analysis domain, which accounts for 25-36% of the CERTIFIED-DATA-SCIENCE-PRACTITIONER exam.

28questions here

6free pages

7concepts

25-36%of the exam

Questions 11–15

11foundation · easy
Which measure of central tendency is most appropriate for a numerical feature that has a heavily skewed distribution?
Select an answer first
12application · easy
A data scientist is studying the joint distribution of 'age' and 'blood_pressure' for 500 patients. They want to see if there is a relationship and also check for any clusters. Which visualization is most appropriate?
Select an answer first
13foundation · easy
Which plot is most appropriate for visualizing the distribution of a single continuous variable?
Select an answer first
14foundation · easy
In a supervised learning problem where the goal is to predict whether a customer will churn, what is the target feature?
Select an answer first
15application · medium
An analyst is examining a single numerical variable 'response_time' from a web server log. The histogram shows a concentration of values near 50 ms, but there are a few isolated bars far to the right near 5000 ms. Which visualization and follow-up action is most appropriate?
Select an answer first

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Objective 3.1 Examine Data CERTIFIED-DATA-SCIENCE-PRACTITIONER Practice Questions (Page 3)

Questions 11–15

Which measure of central tendency is most appropriate for a numerical feature that has a heavily skewed distribution?

A data scientist is studying the joint distribution of 'age' and 'blood_pressure' for 500 patients. They want to see if there is a relationship and also check for any clusters. Which visualization is most appropriate?

Which plot is most appropriate for visualizing the distribution of a single continuous variable?

In a supervised learning problem where the goal is to predict whether a customer will churn, what is the target feature?

An analyst is examining a single numerical variable 'response_time' from a web server log. The histogram shows a concentration of values near 50 ms, but there are a few isolated bars far to the right near 5000 ms. Which visualization and follow-up action is most appropriate?

Keep studying — 3.0 Performing exploratory data analysis