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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 = .000952 mm. Assume a random sample of 59 sheets of metal resulted in an x¯

= .3354 mm.

Calculate the 99 percent confidence interval for the true mean metal thickness. (Round your answers to 4 decimal places.)

1 Answer

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the answer is (0.3351, 0.3357) mm

User Bmewburn
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