Conditional summation notation
Post date: 2020-08-01 11:00:48
Views: 262
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:
Why institutional investors are returning to retail 'in a very big way'
SpaceX targets $135 IPO price at valuation of $1.77 trillion
The Chase Sapphire Reserve's all-time-high 150,000-point bonus is ending soon. Here's why I applied
SoftBank shares plunge over 11% amid broader tech sell-off
As Honeywell Aerospace readies for its stand-alone debut, its CEO is forecasting big growth
I want control of my Keyboard Shortcuts (Windows)
Movie: Escape from Alcatraz
Book: Dungeon Crawler Carl Book 8: A Parade of Horribles
Micron, Marvell, and Broadcom sink, leading chip stocks lower
Eli Manning weighs in on Giants QB Jaxson Dart's Trump rally fallout