Which of the following describes the placebo effect? a) at least one block of subjects in an experiment receives only placebos. b) subjects may reaping to a treatment simply because they believe it is affecting them. c) subjects are prevented from knowing whether they are receiving real drugs or placebos. d) an experiment is repeated many times with real drugs and placebos. e) subjects receive inactive sugar pills instead of real medication.

Correct answer choice is:

C. Subjects may respond to a treatment simply because they believe it is affecting them.

Explanation:

A placebo is a material or procedure of no predetermined therapeutic utility. General placebos comprise inactive tablets, inactive injections, false surgery, and other methods.

step-by-step explanation: given equation a = h(b 1+b 2)

also we are given values of a, h and b 1 as :

a = 16, h = 4, and b 1 = 3.

in order to solve it for b 2, we need to plug the given values of   a, h and b 1 .

therefore, plugging values of   a, h and b 1   in given equation, we get

16 = 4( 3 + b 2)

first dividing both sides by 4, we get

4 = 3 + b 2

subtracting 3 from both sides, we get

4 -3 = 3 -3 + b 2

1 = b 2.