2001 2014 Measurement Testing 
The Unofficial Google Data Science Blog
JUNE 30, 2016
A naïve way to solve this problem would be to compare the proportion of buyers between the exposed and unexposed groups, using a simple test for equality of means. This algorithm is implemented in the SuperLearner R package (Polley & van der Laan, 2014). This is often referred to as the positivity assumption.
Domino Data Lab
APRIL 3, 2019
Network security mushrooms with VPNs, IDS , gateways, various bump-in-the-wire solutions, SIMS tying all the anti-intrusion measures within the perimeter together, and so on. My read of that narrative arc is that some truly weird tensions showed up circa 2001: Arguably, it’s the heyday of DW+BI. credit cards). Data is on the move.
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