Calculate the 90 percent confidence interval

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Reference no: EM132461575

The Ball Corporation's beverage can manufacturing plant in Fort Atkinson, Wisconsin, uses a metal supplier that provides metal with a known thickness standard deviation σ = .000669 mm. Assume a random sample of 52 sheets of metal resulted in an x

¯

x¯ = .2378 mm.

Calculate the 90 percent confidence interval for the true mean metal thickness. (Round your answers to 4 decimal places.)

The 90% confidence interval is from  ___ to  ___

Reference no: EM132461575

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