Python Institute PCED-30-01 Practice Exams
Last updated on Oct 22,2026- Exam Code: PCED-30-01
- Exam Name: Certified Entry-Level Data Analyst with Python
- Certification Provider: Python Institute
- Latest update: Oct 22,2026
Question #231
Which of the following can be used for outlier detection in a dataset during data pre-processing?
- A . Z-Score
- B . Mean Absolute Deviation
- C . IQR (Interquartile Range)
- D . All of the above
Correct Answer: D
Question #232
Which of the following is an example of data transformation in pre-processing?
- A . Converting categorical variables into numerical ones
- B . Removing outliers from the dataset
- C . Calculating the mean and standard deviation
- D . Visualizing correlation between variables
Correct Answer: A
Question #233
Which of the following is a popular online platform for creating interactive data visualizations and dashboards?
- A . Tableau
- B . Excel
- C . Power BI
- D . Google Sheets
Correct Answer: A
Question #234
When is the mode the most appropriate measure of central tendency to use?
- A . When the data is normally distributed
- B . When the data has outliers
- C . When the data is skewed
- D . When the data is categorical
Correct Answer: D