Question 22 (4 points) One characteristic necessary for an observational study is that the researchers do not know if participants are in the control or treatment group as they have been randomly assigned. Question 19 (4 points) In 2017, an increase in the cases of Carbon Monoxide poisoning was observed after Hurricane Irma made landfall in Florida. The number of cases per county in the state of Florida was gathered, and it was found that the average number of cases of carbon monoxide poisoning in a county is 8.55, with a standard deviation of 17.23 (Source: http:/www.floridahealth.gov/diseases-and-conditions/disease-reporting-and-management/disease- reporting-and-surveillance/data-and-publications/_documents/2017-amr-appendices.pdf). O Suppose the that mean number of carbon monoxide poisoning in a county follows a O normal distribution. The probability that a county in Florida has less than 6 cases of carbon monoxide poisoning is _ O A) 28.02% O O B) 14.80% C) 71.98% ( D) 55.96% O E) 44.04%