Okay, I confess. 12/13. I missed the nitrogen one.
The one about medical studies was wrong though. It asked if the proper study procedure to evaluate the effectiveness of a drug is to give the medicine to all or to give half the group the medicine and half nothing. The correct procedure is to divide the group into thirds: medicine/nothing/placebo.
I found the interesting thing about that one to be the fact that it was the only question to which more females than males answered "correctly" according to the required answer. Actually, two groups would work if the second group received a placebo. Each test member must believe they are receiving treatment for the test to be valid. Then, any differences between the two groups can be attributed to the effects of the drug. There may be some placebo effect, but researchers want to see the effect of the drug over and above that. A two group test will do that sufficiently. . . and the placebo effect is well documented so they know what percentage to adjust for.
Agreed!
I’m not a Doctor or Scientist but in 2003 I did stay at a Holiday Inn Express!