A state school administrator says that the standard deviation of SAT critical reading test scores is112. A

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A state school administrator says that the standard deviation of SAT critical reading test scores is112.

A random sample of 19 SAT critical reading test scores has a standard deviation of143.

At a = 0.10, test the administrator's claim. What can you conclude? Assume the population is normally distributed. (Adapted from The College Board)

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