A Bangladeshi vaccine against Covid-19 demonstrated a vaccine efficacy of 50.0% .It means that vaccinated people have a 50.0% lower risk of getting COVID-19 compared to others who weren't vaccinated. Suppose 19 human volunteers from Noakhali were randomly selected for clinical trials . a. What is the mean number of volunteers who'll be at a lower risk ? Answer in exact fraction, or rounded to at least 2 decimal places.
A Bangladeshi vaccine against Covid-19 demonstrated a vaccine efficacy of 50.0% .It means that vaccinated people have a 50.0% lower risk of getting COVID-19 compared to others who weren't vaccinated. Suppose 19 human volunteers from Noakhali were randomly selected for clinical trials . a. What is the mean number of volunteers who'll be at a lower risk ? Answer in exact fraction, or rounded to at least 2 decimal places.
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![A Bangladeshi vaccine against Covid-19 demonstrated a vaccine efficacy of 50.0% .It means that vaccinated people have a 50.0% lower risk of getting
COVID-19 compared to others who weren't vaccinated. Suppose 19 human volunteers from Noakhali were randomly selected for clinical trials.
a. What is the mean number of volunteers whoʻll be at a lower risk ?
Answer in exact fraction, or rounded to at least 2 decimal places.
b. What is the standard deviation in the number of volunteers at a lower risk of getting COVID-19?
Answer in exact fraction, or rounded to at least 2 decimal places.
c. What is the probability that the number of volunteers with a lower risk is more than 2 standard deviations away from the mean value?
Answer in exact fraction, or rounded to at least 4 decimal places.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7f6f5f0d-1365-4765-8c17-23310cc33b0a%2F89e0318d-9848-4e56-acff-6b7b254cb1ba%2Ftr8oel_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A Bangladeshi vaccine against Covid-19 demonstrated a vaccine efficacy of 50.0% .It means that vaccinated people have a 50.0% lower risk of getting
COVID-19 compared to others who weren't vaccinated. Suppose 19 human volunteers from Noakhali were randomly selected for clinical trials.
a. What is the mean number of volunteers whoʻll be at a lower risk ?
Answer in exact fraction, or rounded to at least 2 decimal places.
b. What is the standard deviation in the number of volunteers at a lower risk of getting COVID-19?
Answer in exact fraction, or rounded to at least 2 decimal places.
c. What is the probability that the number of volunteers with a lower risk is more than 2 standard deviations away from the mean value?
Answer in exact fraction, or rounded to at least 4 decimal places.
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