Adrug company tests a new drug by giving some sick people the medicine and by giving other sick people a sugar pill (shaped to look like the medicine). if a sick person taking the sugar pill gets better, that is an example of:

1.the placebo effect
2.the margin of error
3.a confounding factor
4.a bias

This is an example of:

Placebo Effect.

Placebo Effect--

The placebo effect is a beneficial health outcome or a fascinating phenomenon that occurs  resulting from a person's anticipation that an intervention—pill, procedure, or injection, for example—will help them.

In this phenomenon it was observed that a fake pill help in improving the health condition of a patient as compared to a true drug or medicine.

Hence, from the information given in the question we see that the following condition is an example of:

Placebo Effect.

b) 36

step-by-step explanation:

18 times 2 is 36

answer:

a=9

step-by-step explanation: lmk if you need a explanation