To determine if a new pain medication if effective, researchers randonly assign two groups of people to use the pain meditation in a group 1 anf a placebo in group 2. both groups are asjed to rate their oain and the resultd are compared. What type of study is this? A: Survey
B: Observational
C: Experinental
D: This is not a statistical question​

Kevin is an insurance salesman. when he sells a policy, he makes 20 percent of the policy premium (p) up front; then each year the policy is active, he receives 15 percent of the original premium. which equation could be used to figure his total commission on a policy that has been active for five years? c=0.80p c=0.20p + 0.15p c=0.35p + 4(0.15) c=0.95p

What is the upper quartile in the box plot?

Asurvey of 2,000 doctors showed that an average of 3 out of 5 doctors use brand x aspirin.how many doctors use brand x aspirin