(Answered) A random sample of 79 eighth grade students score on a

Economics

A random sample of 79 eighth grade students score on a national mathematics assessment test has a mean score of 263. This test result prompts a state school administrator to declare that the mean score for the states eighth graders on this exam is more than 260. Assume the population standard deviation is 32. At x=11, is there enough evidence to support the administrators claim? Find the standardized test statistic z, and its corresponding area. z=?

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