certain drug can be used to reduce the acid produced by the body and heal damage to the esophagus due to acid reflux. The manufacturer of the drug claims that more than 91​% of patients taking the drug are healed within 8 weeks. In clinical​ trials, 211 of 228 patients suffering from acid reflux disease were healed after 8 weeks. Test the​ manufacturer's claim at the α=0.01 level of significance. Find the test​ statistic, z0= _______ Find P value _______

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