A doctor released the results of clinical trials for a vaccine to prevent a particular disease. In these clinical trials, 200,000 children were randomly diVlded IA tWU 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 100,000 children in the experimental group, 18 developed the disease. Of the 100,000 children in the control group, 62 developed the disease. Complete parts (a) through (f) below. (a) What type of experimental design is this? O Randomized block design Completely randomized design Matched-pairs design Case-control (b) What is the response variable? O A. The amount of the vaccine received O B. Whether the vaccine prevented the disease or not O C. Whether the subject was in group 1 or group 2 D. Whether the subject contracted the disease or not (c) What are the treatments? OA Group 1 or group 2 B. The amount of the vaccine received O C. The amount of the placebo received D. The vaccine or placebo (d) What is a placebo? O A. Whatever does the opposite of the actual medication B. An innocuous medication O C. Water O D. A pill (e) Why is such a large number of subjects needed for this study? O A. The number of subjects is so large because the vaccine is very effective. O B. The number of subjects is so large because a large sample size is needed to ensure that the samples are independent. OC. The number of subjects is so large because there is a low incidence rate of the disease. O D. The number of subjects is so large because these are clinical trials, which require a significant number of subjects. O E. The number of subjects is so large because the vaccine is not very effective.
A doctor released the results of clinical trials for a vaccine to prevent a particular disease. In these clinical trials, 200,000 children were randomly diVlded IA tWU 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 100,000 children in the experimental group, 18 developed the disease. Of the 100,000 children in the control group, 62 developed the disease. Complete parts (a) through (f) below. (a) What type of experimental design is this? O Randomized block design Completely randomized design Matched-pairs design Case-control (b) What is the response variable? O A. The amount of the vaccine received O B. Whether the vaccine prevented the disease or not O C. Whether the subject was in group 1 or group 2 D. Whether the subject contracted the disease or not (c) What are the treatments? OA Group 1 or group 2 B. The amount of the vaccine received O C. The amount of the placebo received D. The vaccine or placebo (d) What is a placebo? O A. Whatever does the opposite of the actual medication B. An innocuous medication O C. Water O D. A pill (e) Why is such a large number of subjects needed for this study? O A. The number of subjects is so large because the vaccine is very effective. O B. The number of subjects is so large because a large sample size is needed to ensure that the samples are independent. OC. The number of subjects is so large because there is a low incidence rate of the disease. O D. The number of subjects is so large because these are clinical trials, which require a significant number of subjects. O E. The number of subjects is so large because the vaccine is not very effective.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 27PPS
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Transcribed Image Text:A doctor released the results of clinical trials for a vaccine to prevent a particular disease. In these clinical trials, 200,000 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
100,000 children in the experimental group, 18 developed the disease. Of the 100,000 children in the control group, 62 developed the disease. Complete parts (a)
through (f) below.
(a) What type of experimental design is this?
Randomized block design
Completely randomized design
O Matched-pairs design
Case-control
(b) What is the response variable?
O A. The amount of the vaccine received
B. Whether the vaccine prevented the disease or not
O C. Whether the subject was in group 1 or group 2
D. Whether the subject contracted the disease or not
(c) What are the treatments?
O A. Group 1 or group 2
B. The amount of the vaccine received
O C. The amount of the placebo received
*p.
The vaccine or placebo
(d) What is a placebo?
O A. Whatever does the opposite of the actual medication
C B. An innocuous medication
O C. Water
O D. A pill
(e) Why is such a large number of subjects needed for this study?
O A. The number of subjects is so large because the vaccine is very effective.
O B. The number of subjects is so large because a large sample size is needed to ensure that the samples are independent.
O C. The number of subjects is so large because there is a low incidence rate of the disease.
O D. The number of subjects is so large because these are clinical trials, which require a significant number of subjects.
O E. The number of subjects is so large because the vaccine is not very effective.
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