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The mean critical reading SAT score is 501, with a standard deviation of 112. A particular...

The mean critical reading SAT score is 501, with a standard deviation of 112. A particular high school claims that its students have unusually high critical reading SAT scores. A random sample of 50 students from this school was selected, and the mean critical reading SAT score was 515.

a.) Is the high school justified in its claim? Explain.

Math   Statistics-And-Probability   
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Total number of sample taken is n=50.

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