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21 An established treatment for a particular disease is known to be effective in 78% of the cases. A doctor devises a new treatment which

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21 An established treatment for a particular disease is known to be effective in 78% of the cases. A doctor devises a new treatment which she believes is more effective. She uses the treatment on a random sample of 60 patients and finds that the new treatment is effective in 52 cases. Does this data support the doctor's belief at the 2% significance level

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