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Evidence to support the? administrator claim

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Reference no: EM132150191

A random sample of 87 eighth grade? students' scores on a national mathematics assessment test has a mean score of 278. This test result prompts a state school administrator to declare that the mean score for the? state's eighth graders on this exam is more than 275. Assume that the population standard deviation is 39. At α=0.05?, is there enough evidence to support the? administrator's claim?

Reference no: EM132150191

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