Question: A laboratory believes that its equipment needs adjustment when the standard deviation of five samples of a known concentration exceeds 4 mg/L. During one test,

A laboratory believes that its equipment needs adjustment when the standard deviation of five samples of a known concentration exceeds 4 mg/L. During one test, the following sample measurements were recorded: 50.7, 58.2, 46.3, 53.0, and 62.4 mg/L. Does a confidence interval suggest that the equipment requires adjustment? Explain.

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