Question

question #1
an experiment to study the success of a new medication splits a group of 100 participants into two groups randomly. the first group gets the new medication, and the second group gets a fake treatment. no participant knows which group they have been placed in. it is observed that 80% of the participants in the first group experiences improvement and 15% of the participants in the second group experience improvement.
which element of experimental design is known to be a part of this study?
control
matched pairs design
confounding
blinding
question #2
true or false. a drug company is testing a new medicine. they give one group of test subjects the new medicine in a tablet. they give the other group an identical tablet with no medicine.
this is an example of a placebo.
false
true

Explanation:

Question #1

• Control: A control group is a group in an experiment that does not receive the treatment (in this case, the fake treatment group is the control group).
• Matched Pairs Design: This would involve pairing similar subjects and giving different treatments to each pair, which is not described here.
• Confounding: A confounding variable is an extraneous variable that affects the outcome, but this is not indicated in the question.
• Blinding: Blinding is when participants (or experimenters) do not know which treatment is being received. While it is mentioned that participants don't know their group, the key element here is the presence of a control group (the fake - treatment group).

A placebo is a substance that has no therapeutic effect (like the tablet with no medicine). It is used to compare against the real treatment (the new medicine tablet).

Answer:

Control

Question #2