Data Cleaning Exercises

Dataset pack

Visits and conversion outcomes

Website visits by marketing channel, with a yes/no conversion outcome.

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 A rate is the mean of a 0/1 column.

visits 18 rows × 3 columns

Download visits.csv (Pro)

Data dictionary

id
Unique visit ID.
channel
Marketing channel.
converted
yes or no.

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.