Multiple Response Please select all correct answers and clic

Multiple Response: Please select all correct answers and click \"submit.\" A drug researcher wishes to test a new pain medication for effectiveness in treating the pain associated with arthritis. 20 of 40 severely disabled arthritis sufferers in a hospital ward will receive the drug. The other 20 will receive a placebo. The experimenters do not known whether any given subject will receive the drug or the placebo. which of the following principles of experimental design are being followed? check all that apply. A. control B. Blindness C. Blocking D. Confounding E. Replication

Solution

.The correct answer is A. Control and E Replication

Control:

The word control in experimental design is used for a treatment where the patients do not receive any treatment but we need to find out the effectiveness of other treatments through comparison.

Replication:

The more cases researchers observe, the more accurately they can estimate the effect of the explanatory variable on the response. In a single study, we replicate by collecting a sufficiently large sample.