Question: A type of universal remote for home theater systems is manufactured in three distinct locations. Twenty percent of the remotes are manufactured in location A, 50% in location B, and 30% in location C. The quality control team (QCT) wants to inspect a simple random sample (SRS) of 100 remotes to see if a recently reported problem with the menu feature has been corrected. The QCT requests that each location send to the QC Inspection Facility a SRS of remotes from their recent production as follows: 20 from location A, 50 from B, and 30 from C.
(a) Does the sampling scheme described produce a simple random sample of size 100 from the recent production of remotes?
(b) Justify your answer in part (a). If you answer no, then what kind of sampling is it?