Subject: elementary math error in journal article
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3615184/ was linked to and discussed today from Hacker News (a popular discussion board for software engineers) here https://news.ycombinator.com/item?id=22307445.
In the ensuing discussion a poster noticed that the journal article contains an elementary math error:
"if schizophrenia occurs at a rate of 0.72% in the population (McGrath et al., 2008) and congenital blindness occurs at an estimated rate of 0.03% in people born in the 1970s and 1980s (based on Robinson et al., 1987), then the joint probability of a person having both conditions, if the two are independent, would be 0.02% or 2 out of every 10,000."
0.72% * 0.03% is actually .0002% or 2 out of every 1,000,000.
Despite the article being several years old, I thought you might want to know.
-harryh