A doctor released the results of clinical trials for a vaccine to prevent a particular disease. In these clinical trials, 400,000 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 200,000 children in the experimental group, 41 developed the disease. Of the 200,000 children in the control group, 109 developed the disease. Complete parts (a) through (f) below. (d) What is a placebo? OA. An innocuous medication OB. Whatever does the opposite of the actual medication OC. A pill OD. Water (e) Why is such a large number of subjects needed for this study? OA. The number of subjects is so large because the vaccine is very effective. OB. 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 these are clinical trials, which require a significant number of subjects. OD. The number of subjects is so large because the vaccine is not very effective. O E. The number of subjects is so large because there is a low incidence rate of the disease. (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. A. The data come from a population that is normally distributed. B. The samples are dependent. C. The sample size is less than 5% of the population size for each sample. D. The sample size is more than 5% of the population size for each sample. E. The samples are independent.
A doctor released the results of clinical trials for a vaccine to prevent a particular disease. In these clinical trials, 400,000 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 200,000 children in the experimental group, 41 developed the disease. Of the 200,000 children in the control group, 109 developed the disease. Complete parts (a) through (f) below. (d) What is a placebo? OA. An innocuous medication OB. Whatever does the opposite of the actual medication OC. A pill OD. Water (e) Why is such a large number of subjects needed for this study? OA. The number of subjects is so large because the vaccine is very effective. OB. 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 these are clinical trials, which require a significant number of subjects. OD. The number of subjects is so large because the vaccine is not very effective. O E. The number of subjects is so large because there is a low incidence rate of the disease. (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. A. The data come from a population that is normally distributed. B. The samples are dependent. C. The sample size is less than 5% of the population size for each sample. D. The sample size is more than 5% of the population size for each sample. E. The samples are independent.
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.5: Interpreting Data
Problem 1C
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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, 400,000 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 200,000 children in the experimental group, 41 developed the disease. Of the 200,000 children in the control group, 109 developed the disease.
Complete parts (a) through (f) below.
(d) What is a placebo?
OA. An innocuous medication
OB. Whatever does the opposite of the actual medication
OC. A pill
OD. Water
(e) Why is such a large number of subjects needed for this study?
OA. The number of subjects is so large because the vaccine is very effective.
OB. 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 these are clinical trials, which require a significant number of subjects.
O D. The number of subjects is so large because the vaccine is not very effective.
O E. The number of subjects is so large because there is a low incidence rate of the disease.
(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.
A. The data come from a population that is normally distributed.
B. The samples are dependent.
C. The sample size is less than 5% of the population size for each sample.
D. The sample size is more than 5% of the population size for each sample.
E. The samples are independent.
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