Hi,
You're correct that this was a small sample size: 127 respondents. However, given that we know that the gender gap in STEM subjects is particularly bad in certain countries (like the United States), whereas in other countries, girls perform just as well as or outperform boys, it does seem that gender differences in performance in our country are not due to innate differences. And those country-wide performance scores are definitely from sample sizes where you can be sure of statistical significance!
http://blogs.edweek.org/edweek/curriculum/2012/06/evidence_persists_of_stem_achi.htmlLaura
