15. 780 men suffering from high blood pressure were randomly assigned to one of two groups. Over a four-month period, th

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15. 780 men suffering from high blood pressure were randomly
assigned to one of two groups. Over a four-month period, the first
group received an experimental drug and the second group
received a placebo (sugar pill). The patients did not know
whether they were receiving the drug or the placebo. The
technicians administering the treatments did not
know and the physicians evaluating the results
did not know which patients were receiving the drug and
which received the placebo. Based on the notes foe the class, this
drug trial was an example of
A) Single Blind​​​​B) Double Blind
C) None of the Answers
16. A firm that sells medications for male prostate
conditions, researched whether or not their medications
significantly improved the prostate conditions for men. The
research had 200 men who had taken the medications and 250 men who
had not, there was no random assignment for other factors. Which of
the following could be possible
lurking (hidden) variables?
​I. Age
​II. Gender
​III. Prostate Status
​IV. Diet
​V. Ethnic Background
A) II and IV​​​​B) None of the Answers
C) II, IV, and V​​​​D) II, III and V
E) I and II