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The graduating averages of high school students in Boston are normally distributed with a mean of...

The graduating averages of high school students in Boston are normally distributed with a mean of 79 and a standard deviation of 14. A random sample of 25 students from one of the schools has a mean of 85. Use a two-tailed test at (letter alpha)α=.01 to test the hypothesis that students from this school are at par with the city average.

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