Which sampling plan uses master tables to interpret results?

Which sampling plan uses master tables to interpret results?

• A. 100% inspection
• B. Simple random sampling
• C. Square root system
• D. Military standard

Answer: (D)

Master tables are reference tools used by some sampling plans to decide whether to accept or reject a lot once results from a sample are known. In the military standard approach for inspection by attributes, these tables list the required sample size and the number of defects (the acceptance number) for each combination of lot size and inspection level. You count the defects in the sample, then look up the corresponding acceptance number in the table. If the defect count is within the table’s limit, the lot is accepted; if it exceeds it, the lot is rejected. This method allows quick, standardized decisions without performing new statistical calculations for every lot. Other options involve inspecting every item, using random sampling with methods not tied to master tables, or applying different rules like the square-root method, which don’t rely on master tables to interpret results.