In a random sample of 300 patients with rheumatoid arthritis, 192 of them responded favourably to a new drug. We can be 95% confident that the proportion of all patients who would respond favourably to this new drug is between 0.569 and 0.711. O0.576 and 0.704. O 0.594 and 0.686. O0.581 and 0.699. O 0.586 and 0.694.

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