A doctor released the results of clinical trials for a vaccine to prevent a particular disease. In these clinical trials, 200 comma 000 children were randomly divided in two groups. The subjects in group 1 (the experimental group) were given the vaccine, while the subjects in group 2 (the control group) were given a placebo. Of the 100 comma 000 children in the experimental group, 17 developed the disease. Of the 100 comma 000 children in the control group, 52 developed the disease. Complete parts (a) through (f) below. Question content area bottom Part 1 (a) What type of experimental design is this? Matched-pairs design Case-control Randomized block design Completely randomized design (b) What is the response variable? A. Whether the subject was in group 1 or group 2 B. Whether the subject contracted the disease or not C. The amount of the vaccine received D. Whether the vaccine prevented the disease or not (c) What are the treatments? A. Group 1 or group 2 B. The vaccine or placebo C. The amount of the vaccine received D. The amount of the placebo received (d) What is a placebo? A. An innocuous medication B. Whatever does the opposite of the actual medication C. A pill D. Water (e) Why is such a large number of subjects needed for this study? A. The number of subjects is so large because the vaccine is not very effective. B. The number of subjects is so large because these are clinical trials, which require a significant number of subjects. C. The