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 = .000943 mm. Assume a random sample of 58 sheets of metal resulted in an x¯x¯ = .2603 mm.   Calculate the 99 percent confidence interval for the true mean metal thickness. (Round your answers to 4 decimal places.)    The 99% confidence interval is from blank  to   blank?

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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 = .000943 mm. Assume a random sample of 58 sheets of metal resulted in an x¯x¯ = .2603 mm.
 
Calculate the 99 percent confidence interval for the true mean metal thickness. (Round your answers to 4 decimal places.)
  
The 99% confidence interval is from blank  to   blank? 

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