Bob is a participant in a study investigating the effectiveness of Ritalin in treating ADHD. Bob has ADHD, but is in a group that received a placebo (sugar pills) instead of Ritalin. Bob is in the group

control group

Explanation:

In this scenario, it can be said that Bob is in the control group of the experiment. In an experiment, the control group is the group that does not receive the variable that is being tested and instead receives a placebo that does not have any effect on the test subject, thus allowing the researchers to control the outcome of that group and compare it with the other groups. Which in this case the variable being tested is Ritalin.

bro these r easy u may have to do them urself bro. lol jk the answer is two for nimber one, and for question number two sahel boi xd have fun get rekt m8