(5 points) In a city, about 45% of all residents have received a COVID-19 vaccine. Suppose that a random sample of 12 re

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5 Points In A City About 45 Of All Residents Have Received A Covid 19 Vaccine Suppose That A Random Sample Of 12 Re 1 (90.66 KiB) Viewed 89 times

(5 points) In a city, about 45% of all residents have received a COVID-19 vaccine. Suppose that a random sample of 12 residents is selected. Part A Calculate the probability that exactly 4 residents have received a COVID-19 vaccine in the sample. (Round the probabilities to 4 decimal places if possible) Part B Calculate the probability that at most 4 residents have received a COVID-19 vaccine in the sample. (Round the probabilities to 4 decimal places if possible) Part C Calculate the probability that at least 4 residents have received a COVID-19 vaccine in the sample. (Round the probabilities to 4 decimal places if possible) Part D Calculate the expected number of residents who have received a COVID-19 vaccine in the sample. (Round the expected value to 4 decimal places if possible) Part E Calculate the standard deviation of the number of residents who have received a COVID-19 vaccine. (Round the standard deviation to 4 decimal places if possible)