The incubation period for COVID-19, which is the time between exposure to the virus (becoming infected) and symptom onset, is on average 5-6 days. However, it can be up to 14 days. During this period, also known as the “pre-symptomatic” period, some infected persons can be contagious. Therefore, transmission from a pre-symptomatic case can occur before symptom onset. A sample of 11 COVID-19 patients had the following incubation periods (days): 5, 13, 9, 7, 11, 9, 6, 11, 8, 5, 12 REQUIRED: Calculate the mean and standard deviation. Interpret your answers. Calculate the coefficient of variation and interpret your answer. A certain medical test is known to detect 75% of the people who are infected with corona-virus disease. If 8 people with the disease are administered the test, what is the probability that the test will show that at least 8 people have the disease?

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