For the following report about a statistical study, identify (if possible) a) the population; b) the population parameter of interest; c) the sampling frame; d) the sample; e) the sampling method, including whether or not randomization was employed; f) who (if anyone) was left out of the study; and g) any potential sources of bias you can detect and any problems you see in generalizing to the population of interest. A company packaging snack foods maintains quality control by randomly selecting 10 cases from each day's production and weighing the bags. Then they open four random bags from each case and inspect the contents.