Question: The manufacturer of a pill for back pain claims that
The manufacturer of a pill for back pain claims that 86% of those who take the pill get relief within one hour. You work for a consumer organization and you want to check the claim. You take a random sample of 350 people with back pain who took the pill and find that 287 of them got relief within one hour. Is there evidence that the proportion of back pain sufferers who get relief within one hour is lower than the manufacturer claims?
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