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Blood types: The blood type 0 negative is called the universal donor type, because it is the only blood type that may safely be transfused
Blood types: The blood type 0 negative is called the "universal donor" type, because it is the only blood type that may safely be transfused into any person. Therefore, when someone needs a transfusion in an emergency and their blood type cannot be determined, they are given type 0 negative blood. For this reason, donors with this blood type are crucial to blood banks. Unfortunately, this blood type is fairly rare; according to the Red Cross, only 7% of U.S. residents have type 0 negative blood. Assume that a blood bank has recruited 24 donors. Part 1 of2 (a) What is the mean number of donors who have type 0 negative blood? Round the answer to two decimal places. The mean number of donors who have type 0 negative blood is I i. X 3) Part 2 of2 (b) What is the standard deviation of the number of donors who have type 0 negative blood? Round the answer to four decimal places. The standard deviation of the number of donors who have type 0 negative blood is I i. X 53
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