Recall
Set 1: Quick Check
Distinguish exact duplicates, repeated events, missing values, and category variants.
Cleaning Missing, Duplicate, and Inconsistent Data
Make defensible cleaning decisions while preserving source values and recording material changes.
Start Chapter PracticeChapter plan
What you will be able to do
- Clean missing, duplicate, and inconsistent values with a documented rule.
- Study time
- 26–32 minutes, self-paced
- Course
- Data Analysis for Business (Beginner)
- Practice order
- Four sets, completed in sequence
Chapter practice
Practice in chapter order
10 activities · 80% mastery target
Start set 1
Guided application
Set 2: Core Practice
Apply documented cleaning rules while preserving source values and audit history.
Hands-on
Set 3: Workplace Task
Clean a small workplace extract and reconcile row counts and financial totals.
Independent check
Set 4: Mastery Check
Reject unsupported imputation, destructive cleaning, and missing validation controls.