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3. We are interested in investigating the proportions of four blood types (ABO system). Somehow we believe that 34% of people have blood type A,

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3. We are interested in investigating the proportions of four blood types (ABO system). Somehow we believe that 34% of people have blood type A, 15% blood type B, 23% blood type AB, and 28% blood type O. We go out to campus and collect a sample of 100 students, and find the following: A: 12, B: 56, AB: 2, O: 30. What do you conclude? State the null hypothesis and compute the p-value

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