Seasonal Flu The risk of catching the seasonal flu varies from year to year. Different flu seasons have different viruses-some seasons are worse than others because the strains are more virulent. Sometimes the strains used to produce the seasonal flu vaccine aren't a good match for the prevalent influenza strain for a particular year. In a test of the seasonal flu vaccine, subjects were randomly assigned to either the vaccine or to placebo. 49 out of 5103 subjects who received the vaccine developed the flu. In the placebo group, 71 out of 2549 subjects developed the flu. PART 1 Use this data to estimate the odds of developing the flu for those who are unvaccinated. (Round your answer to two decimal places and then write your answer in the form A:B) PART 2 Use this data to estimate the odds of developing the flu for those who are given this vaccine. (Round your answer to two decimal places and then write your answer in the form A:B) PART 3 Use this data to estimate the odds ratio of developing the flu for the placebo group as compared to the vaccine group. (Round AT THE END of all your calculations to two decimal places.) PART 4 Based on your result in part C, does this data indicate that there is an association between vaccination and risk of flu? Why or why not? (Be brief!)
Seasonal Flu The risk of catching the seasonal flu varies from year to year. Different flu seasons have different viruses-some seasons are worse than others because the strains are more virulent. Sometimes the strains used to produce the seasonal flu vaccine aren't a good match for the prevalent influenza strain for a particular year. In a test of the seasonal flu vaccine, subjects were randomly assigned to either the vaccine or to placebo. 49 out of 5103 subjects who received the vaccine developed the flu. In the placebo group, 71 out of 2549 subjects developed the flu. PART 1 Use this data to estimate the odds of developing the flu for those who are unvaccinated. (Round your answer to two decimal places and then write your answer in the form A:B) PART 2 Use this data to estimate the odds of developing the flu for those who are given this vaccine. (Round your answer to two decimal places and then write your answer in the form A:B) PART 3 Use this data to estimate the odds ratio of developing the flu for the placebo group as compared to the vaccine group. (Round AT THE END of all your calculations to two decimal places.) PART 4 Based on your result in part C, does this data indicate that there is an association between vaccination and risk of flu? Why or why not? (Be brief!)
Chapter9: Sequences, Probability And Counting Theory
Section9.7: Probability
Problem 3SE: What is an experiment?
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Transcribed Image Text:Seasonal Flu
The risk of catching the seasonal flu varies from year to year. Different flu seasons have different
viruses-some seasons are worse than others because the strains are more virulent. Sometimes
the strains used to produce the seasonal flu vaccine aren't a good match for the prevalent influenza
strain for a particular year.
In a test of the seasonal flu vaccine, subjects were randomly assigned to either the vaccine or to
placebo. 49 out of 5103 subjects who received the vaccine developed the flu. In the placebo
group, 71 out of 2549 subjects developed the flu.
PART 1
Use this data to estimate the odds of developing the flu for those who are unvaccinated. (Round
your answer to two decimal places and then write your answer in the form A:B)
PART 2
Use this data to estimate the odds of developing the flu for those who are given this vaccine.
(Round your answer to two decimal places and then write your answer in the form A:B)
PART 3
Use this data to estimate the odds ratio of developing the flu for the placebo group as compared to
the vaccine group. (Round AT THE END of all your calculations to two decimal places.)
PART 4
Based on your result in part C, does this data indicate that there is an association between
vaccination and risk of flu? Why or why not? (Be brief!)
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