According to the center for disease control (cdc), "measles is highly contagious and can be spread to others from four days before to four days after the rash appears. measles is so contagious that if one person has it, 90% of the people close to that person who are not immune will also become infected with the measles virus." if an individual has a contact rate of approximately 2 individuals per day, what percentage of the population needs to be vaccinated to prevent outbreaks of the disease?

Apoll is being conducted at a mall nothingto obtain a sample of the population of an entire country. what is the frame for this type of​ sampling? who would be excluded from the survey and how might this affect the results of the​ survey? what is the frame for this type of​ sampling? a. the frame is people who need new clothes. b. the frame is people who shop at the mall. c. the frame is people who like to shop. d. the frame is the entire population of the country. who would be excluded from the survey and how might this affect the results of the​ survey? a. any person that does not need new clothes is excluded. this could result in sampling bias due to undercoverage. b. any person who does not shop at the mall is excluded. this could result in sampling bias due to undercoverage. c. any person who does not shop at the mall is excluded. this could result in nonresponse bias due to people not participating in the poll. d. there is nobody that is being excluded from the survey.