Errors in action

Here are a few examples of the kinds of errors you might notice when you’re extracting data:

Read this passage from a real research study:

Data for the 40 patients who were given all 4 doses of medications were considered evaluable for efficacy and safety. The overall study population consisted of 10 (44%) men and 24 (56%) women, with a racial composition of 38 (88%) whites and 5 (12%) blacks.

How many patients were in this study?  Be sure to look at the break down of men versus women and the racial composition of the participants.