Exercise

Calculating aggregated variables with timegap

Assume you want to construct a predictive model to predict which donors will make a donation of at least 10 Euro during the next month. The timeline is given below, there is a timegap of one month. In this exercise, you will learn how to add a variable "mean_donation_last_month" to the basetable.

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Fill out the start (April 1st 2018) and end date (May 1st 2018) of the period on which the predictive variable "mean_donation_last_month" is calculated.