The production line that packages boxes of raisins at a snac

The production line that packages boxes of raisins at a snack food manufacturer will be considered operating properly if the average weight of the boxes of raisins is 1.5 ounces with a standard deviation of 0.1 ounces. A random sample of 16 boxes showed an average weight of 1.45 ounces. What should be the correct decision and conclusion when testing to determine if the production line is operating properly by allowing a 1% probability of committing a Type I error?

the sample standard deviation needs to be known

Solution

ans:

The sample standard deviation needs to be known

and

The population mean needs to be known.