Exercise

Examining the different cohorts

To finish this lesson, you're now going to plot by 'country' and then by 'device' and examine the results. Hopefully you will see the observed lift across all groups as designed. This would point to the change being the cause of the lift, not some other event impacting the purchase rate.

Instructions 1/2

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1
Plot the average first week purchases for each country by registration date ('reg_date'). There are 6 countries here: 'USA', 'CAN', 'FRA', 'BRA', 'TUR', and 'DEU'. Plot them in the order shown.
2
Now, plot the average first week purchases for each device ('and' and 'iOS') by registration date ('reg_date'). Plot the devices in the order listed.