Question: identify the parameters and other given information 2. A pharmaceutical company says that the efficacy rate of their medicine is 90% and the standard deviation

identify the parameters and other given information

2. A pharmaceutical company says that the efficacy rate of their medicine is 90% and the standard deviation is 2%. A sample of 500 volunteers from a city reveals that the efficacy rate is 88% with a standard deviation of 3%. At 1% significance level, check the veracity of the statement of the company. Parameters

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