he Ball Corporation's beverage can manufacturing plant in Fort Atkinson, Wisconsin, uses a metal supplier that provides metal with a known thickness standard deviation= .000959 mm. Assume a random sample of 58 sheets of metal resulted in an

x

x

= .2731 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 to