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A review of the effects of installing air filters in classrooms

(statmodeling.stat.columbia.edu)
90 points thatcat | 4 comments | 09 Jan 20 22:30 UTC | HN request time: 0.16s | source
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gfody ◴[09 Jan 20 22:22 UTC] No.22006536[source]▶
..or schools willing to change their air filters (or attempt to measure the effect of having changed their air filters) are more likely to be among the higher performers according to traditional KPIs (when controlled for observer bias)?
replies(1): >>22006581 #
1. Someone1234 ◴[09 Jan 20 22:29 UTC] No.22006581[source]▶
The article explains why the air filters were installed, and it doesn't fit your supposition.
replies(1): >>22006661 #
2. gfody ◴[09 Jan 20 22:38 UTC] No.22006661[source]▶
agree, I actually expect there to be all sorts of positive correlations with clean air - but they all start with caring about it enough to do something like change a filter
replies(1): >>22006737 #
3. lalaland1125 ◴[09 Jan 20 22:50 UTC] No.22006737[source]▶
gfody, the schools had no choice about changing their filter or not. In fact, the whole premise of the study relies upon that fact!
replies(1): >>22006818 #
4. gfody ◴[09 Jan 20 23:02 UTC] No.22006818{3}[source]▶
good point, crucial even.. thank you I should get back to work :)