Ishan Goel’s Post

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Helping Experimenters Learn Statistics | Built the New Stats Engine at VWO

In his gifts last year, Santa added an extra “Be Nice” note for half the children. This year Santa has got the “Annual Niceness Score” for each kid from their parents. Santa decided to see if the kids who got the “Be Nice” note actually behaved nicer or not? 🤔 But sadly, the variance in the metric was too high and the test was underpowered. Santa thought of 3 ingenuous ways to increase the power of his results using CUPED. 1. Stratification: Santa realized that boys are more mischievous than girls which can be used to reduce variance. 2. Adjusting for Good School Performance: Santa realized he can use kid’s school performance to reduce more variance. 3. CUPED: Finally, Santa used each kid's last year’s niceness score for the highest power. Bring a cup of hot chocolate and understand the core intuition behind why CUPED works in this Christmas edition Webinar 🎄on 23rd December, 10:00 am EST: https://lnkd.in/gczQ4mxP

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