Question

A study is created in which the participants were randomly assigned to groups for different treatments. Which best describes the reason this was done?

A. It allows us to see the true nature of any effects of different treatments.
 
B. It allows us to determine if the treatment effect is significantly different from the placebo effect.
 
C. It allows us to distinguish among the effects of different factors.
 
D. It allows us to use chance as a way to create groups that are similar to the population.

Answer 1

The correct answer is D) it allows us to use chance to create groups that are similar to the population.

For any study, the sample you use needs to be representative of the population. Using chance helps this process.

Answer 2

D) it allows us to use chance to create groups that are similar to the population.

Explanation:

A study is created in which the participants were randomly assigned to groups for different treatments. This was done as it allows us to use chance to create groups that are similar to the population.

Random assignment is the use of chance, to make sure that every participant has the same chance to be selected in groups. These divided groups can be experimental groups or treatment groups.