Data Cleaning Exercises

Dataset pack

Marketing consent answers

Consent answers collected over several campaigns, where some people were never asked.

Fictional data · UTF-8 CSV, every value quoted so padding and leading zeros survive; empty fields are missing values · free for personal and classroom practice · practise it in Unknown is not no.

responses 20 rows × 3 columns

Download responses.csv (Pro)

Data dictionary

id
Unique response ID.
email
Respondent email.
consent
Consent answer as typed: yes/no, unknown, not asked, or blank.

Values are shown in quotes so leading and trailing spaces are visible. ∅ means the cell is missing. Exercises are also graded on hidden datasets that are never published.