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show all work 30. According to the American Red Cross, 7% of people in the United States have blood type O-negative which makes them universal

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30. According to the American Red Cross, 7% of people in the United States have blood type O-negative which makes them universal donors. For a random sample of 400 people, let p be the proportion with blood type O-negative. a. What is the mean of the sampling distribution ofp. (1 pts) H; = b. What is the standard deviation of the sampling distribution of p. (2 pts) Of =

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