According to the American Red Cross, O positive is the most common blood type. Approximately 45% of the U.S. population has type O blood. However, type O is routinely in short supply and in high demand by hospitals—both because it is the most common blood type and because type O negative blood, in particular, is the universal blood type needed for emergency transfusions. The local American Red Cross is holding a blood drive. How many donors should they expect to collect from until they get a donor with type O blood? What is the probability that the first donor with type O blood occurs on the mean of the distribution? Round your answer to the nearest hundredth if necessary. The American Red Cross had 75 donors show up to their drive and donate blood. How many donors would you expect to have type O blood? The American Red Cross had 75 donors show up to their drive and donate blood. By about how many donors would the expected value for donors with type O blood vary? You find out the next day that of the 75 donors, 55 of them had type O blood. Does this surprise you? Use the range rule of thumb and provide the probability this happens.
According to the American Red Cross, O positive is the most common blood type. Approximately 45% of the U.S. population has type O blood. However, type O is routinely in short supply and in high demand by hospitals—both because it is the most common blood type and because type O negative blood, in particular, is the universal blood type needed for emergency transfusions.
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The local American Red Cross is holding a blood drive. How many donors should they expect to collect from until they get a donor with type O blood?
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What is the
probability that the first donor with type O blood occurs on themean of the distribution? Round your answer to the nearest hundredth if necessary. -
The American Red Cross had 75 donors show up to their drive and donate blood. How many donors would you expect to have type O blood?
-
The American Red Cross had 75 donors show up to their drive and donate blood. By about how many donors would the
expected value for donors with type O blood vary? -
You find out the next day that of the 75 donors, 55 of them had type O blood. Does this surprise you? Use the
range rule of thumb and provide the probability this happens.
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