Conditional summation notation
Post date: 2020-08-01 11:00:48
Views: 223
I'm trying to show a summation for observations i to n, starting with i = 1, that is only applied when another variable (treatment) is equal to 0. What's the correct notation for that?

The idea that I'm trying to turn into mathematical notation is "Each control unit in a given stratum has an uncorrected weight equal to (the unit's survey weight divided by the sum of all survey weights of control units in that stratum) multiplied by (the sum of all survey weights of treatment units in that stratum)," if that helps for context. I feel very self-conscious asking this question; please be kind.
Number of Comments
Please click Here to read the full story.
 
Other Top and Latest Questions:
Bill Ackman built Microsoft stake in first quarter during sell-off, betting on AI and cloud growth
Jim Cramer fears SpaceX's IPO could be 'destructive' for the rest of market
Trump says China and Taiwan should 'both cool it'
Can you help me learn to make 3D shapes out of paper?
ISO: Good board games for 2 people to play outside while waiting in line
Book: The Player of Games
Special Event: Live Stream: Semifinal 2 (2026 Eurovision Song Contest)
Widow's Bay: Beach Reads
Book: Don Quixote, chapter 3
Cisco is the most overbought stock in the S&P 500. Here are the others.