"Is this a probability or an odd? What's a "chan..."

https://arbital.com/p/980

by Dewi Morgan Sep 25 2018


The 90% chance that a patient blackens the tongue depressor, given that they have Diseasitis\. The 30% chance that a patient blackens the tongue depressor, given that they're healthy\. The 3/7 chance that a patient has Diseasitis, given that they blackened the tongue depressor\.

Is this a probability or an odd? What's a "chance"? In this list, "chance"s are expressed both as a fraction, and as a percentage, like some kind of hybrid probablodd. This feels like muddying the waters. When you're introducing a new concept like "probability and odds, while synonyms in lay speak, are different things in statistics", it's probably not good to conflate both with another lay synonym like "chance".