A manufacturer of stainless steel selects a random sample of 12 specimens to determine if the median chromium percentage is greater than 18%. Use the...

A manufacturer of stainless steel selects a random sample of 12 specimens to determine if the median chromium percentage is greater than 18%. Use the StainlessSteel.MTW (available in the Minitab Sample Data folder). Test if the median chromium percentage in all stainless steel specimens produced by the manufacturer is greater than 18%. You may use alpha = 0.05.