Calculating KPIs
You're now going to take what you've learned and work through calculating a KPI yourself. Specifically, you'll calculate the average amount paid per purchase within a user's first 28 days using the purchase_data DataFrame from before.
This KPI can provide a sense of the popularity of different in-app purchase price points to users within their first month.
This exercise is part of the course
Customer Analytics and A/B Testing in Python
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Compute max_purchase_date
max_purchase_date = ____ - timedelta(days=____)