For example, if you look at the Concord Thursday homepage or FB event there's no mention of a fragrance policy. At the end of their Code of Conduct, however, there's:
Consider: We are a fragrance free event. Please do not wear scented products.
This isn't just asking people not to wear perfume or cologne: products not explicitly marketed as "fragrance free" generally have at least some scent. Trying to pick some very ordinary products that don't mention that they're scented on the front, when I read the ingredients they all list both "fragrance" and several scented ingredients (camphor, limonene, benzyl salicylate, etc):
When asked how their attendance would change if BIDA used these interventions, the response was:
But if you're not convinced, let's do some rough estimation.
Other sources account for most of the variation in dance attendance, and masking only plays a small part. The amount of the total variation contributed by masking requirements is 5 %. This number is called the coefficient of determination, and its square root is the correlation: 0.21. This correlation is low enough that we cannot conclude that masking has a significant effect on attendance.
...
"But it still looks like masking has an effect!!" It does. It's just that if the effect is there, it is small enough that we cannot statistically prove an effect with just 44 dances. Assuming the coefficient of determination really is 5 %, and we are aiming for a traditional significance level of 0.05, the sample size curves tell us we would need over 80 dances to be sure of the effect of masking.
The approach they took in their post involves some statistics that make assumptions about the distribution of the data. While these assumptions may well be right, now that we have fast computers we can often use simulations to avoid this. I decided to have a go at analyzing this data with a permutation test.
I set up the far UVC Aerolamp on the stage, slightly angled down, primarily aiming to clear the air above the dancers:
I got a random cheap humidifier on Amazon ($30) but (a) TEG is more viscous than the water its designed for and (b) its output is probably higher than I need. I decided I'd dilute the TEG to resolve both of these.
Work | Nucleic Acid Observatory | |
Work | Speaking | |
Band | Kingfisher | |
Band | Free Raisins | |
Band | Dandelion | |
Code | Whistle Synth | |
Code | Apartment Price Map | |
Board | BIDA Contra | |
Board | Giving What We Can | |
Spouse | Julia | |
Child | Lily | |
Child | Anna | |
Child | Nora |