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= .000631 mm. Assume a random sample of 46 sheets of metal resulted in anx= .3293 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 fromto

random sample of 16 pharmacy customers showed the waiting times below (in minutes).

26 16 25 18 17 24 18 23

14 20 10 18 19 13 17 16

Find a 90 percent confidence interval for, assuming that the sample is from a normal population.(Round your standard deviation answer to 4 decimal places and t-value to 3 decimal places. Round your answers to 3 decimal places.)

The 90% confidence intervalto