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. O 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 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 D. The vaccine or placebo (d) What is a placebo? O A. Whatever does the opposite of the actual medication CB. An innocuous medication 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. 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. OE The number of subjects is so large because the vaccine is not very effective. (f) Does it appear to be the case that the vaccine was effective? Use the a = 0.10 level of significance. First verify the model requirements. Select all that apply. O A. The samples are dependent. OB. The samples are independent. OC. npi (1-P) - 10 and ng P2 (1-P2 = 10 O D. The sample size is more than 5% of the population size for each sample. O E. The data come from a population that is normally distributed. OF. The sample size is less than 5% of the population size for each sample.

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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.
TO 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?
O A. 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
An innocuous medication
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.
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.
OE The number of subjects is so large because the vaccine is not very effective.
(f) Does it appear to be the case that the vaccine was effective? Use the a = 0.10 level of significance.
First verify the model requirements. Select all that apply.
O A. The samples are dependent.
O B. The samples are independent.
10 and n p2 (1-P2 =
2 10
O D. The sample size is more than 5% of the population size for each sample.
O E. The data come from a population that is normally distributed.
OF The sample size is less than 5% of the population size for each sample.
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. TO 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? O A. 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 An innocuous medication 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. 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. OE The number of subjects is so large because the vaccine is not very effective. (f) Does it appear to be the case that the vaccine was effective? Use the a = 0.10 level of significance. First verify the model requirements. Select all that apply. O A. The samples are dependent. O B. The samples are independent. 10 and n p2 (1-P2 = 2 10 O D. The sample size is more than 5% of the population size for each sample. O E. The data come from a population that is normally distributed. OF The sample size is less than 5% of the population size for each sample.
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