AbstractsStatistics

This thesis presents a table of dependent, mixed variables and attributes double sampling plans, where the standard deviation of the quality characteristic is assumed to be known, and the acceptance number is zero for the attributes portion of the plans. The table gives sampling plans for ten ranges of lot sizes, each with ten LTPD levels, from one percent to 40 percent. Operating characteristic curves are presented for five representative plans from the table. In addition, a general discussion of acceptance inspection and lot-by-lot sampling inspection is given. Mixed variables and attributes plans are discussed in some detail for the case of known standard deviation, and somewhat more briefly for the case of unknown standard deviation.