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 = .000970 mm. Assume a random sample of 48 sheets of metal resulted in an x¯x¯ = .1646 mm.   Calculate the 95 percent confidence interval for the true mean metal thickness. (Round your answers to 4 decimal places.)    The 95% confidence interval is from   to

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