As a default, markdown creates Greek Symbols in italics. This is problematic as I have to work in APA style which explicitly requires non-italicized values. Does anyone have a solution here - even packages designed to produce APA style are getting this wrong.
Regardless of font, the following piece Knits to italics on the eta value. Below is complete markdown code that will reproduce the issue
The tutorial group (M = 9.0, SD = 1.0) scored highest, followed by the lecture (M = 7.0, SD = 1.5) and discussion groups (M = 4.8, SD = 0.8), F(2, 12) = 15.8, p < .001, \eta^{2} = .72.