Nexium is a drug that can be used to reduce the acid produced by the body and heal damage to the esophagus due to acid reﬂux. The manufacturer of Nexium claims that more than 94% of patients taking Nexium are healed within 8 weeks. In clinical trials, 213 of 224 patients suffering from acid reﬂux disease were healed after 8 weeks. Test the manufacturer’s claim at the α = 0.01 level of signiﬁcance.
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