Neco 2025 Data Processing Question 7

Practice objective / multiple choice question 7 from the 2025 Neco Data Processing examination.

Neco 2025 Data Processing Objective / Multiple Choice Medium Difficulty
Question 7 NECO • 2025 • DATA_PROCESSING • objective

A raw data set contains 500 records. Eight percent of the records are duplicate entries, and five percent have missing values. During data cleaning, duplicate records are removed first, then missing values are imputed with the mean. After cleaning, how many records remain and what is the overall percentage reduction from the original data set?

Answer Options

A. 460 records remain; 5% reduction.
B. 475 records remain; 5% reduction.
C. 435 records remain; 13% reduction.
Correct Answer D. 460 records remain; 8% reduction.
Correct Answer
D
Correct Option:
460 records remain; 8% reduction.

About This Question

This is Neco 2025 Data Processing Question 7. It is one of the objective questions from the 2025 Neco Data Processing examination.

Difficulty level: Medium .

View More Neco 2025 Data Processing Questions More Neco Practice Questions Back to Questions

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Chat with Support