Oxford Paper Company manufactures boxboard for folding cartons made entirely from recycled material. One specific product is designed to have thickness 375 micrometers with standard deviation 7...

Oxford Paper Company manufactures boxboard for folding cartons made entirely from recycled material. One specific product is designed to have thickness 375 micrometers with standard deviation 7 micrometers. A random sample of 21 pieces of boxboard was obtained from the assembly line.