Question: A state school administrator says that the standard deviation of test scores for eighth-grade students who took a life science assessment test is less than or equal to 30. You work for the administrator and are asked to test this claim. To do so, you randomly select 10 tests and find that the tests have a standard deviation of

. 28.8. Construct a 95% confidence interval for the true value of the population standard deviation. At a = 0.05 and using critical regions is there enough evidence to support the administrator's claim? Interpret your results.

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