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A random sample of 77 eighth grade? students' scores on a national mathematics assessment test has a mean score of 290.
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 285.
Assume that the population standard deviation is 30.
At alpha=0.14, is there enough evidence to support the? administrator's claim? Complete parts? (a) through? (e).
?(a) Write the claim mathematically and identify null and alternate hypothesis. What is the standardized test statistic? What is the p value? What is the outcome? Conclusion?.
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