Inspecting groups

Databel offers group contracts to customers from the same household. The advantage for the customer is a discounted rate, while it's a great way for Databel to grow its customer base.

Your task is to analyze if customers that are part of a group indeed have a lower phone bill, and if it has an impact on the churn rate.

We do not recommend doing so, but if you lost progress you can load the solution workbook of the previous exercise 2_2_age_bins_solution.twbx from the Workbooks folder.