Originating in the 1920s as a sampling scheme for agricultural regulatory inspectors, the square root (Sqrt) of the lot size (N) + 1 was semiformalized in an unpublished report by the Association of ...

Manufacturers who use the square root of N plus one rule as part of their overall sampling plan may be surprised to learn of its inadequacies and whether it truly represents the entire batch.

Learning to calculate square roots quickly can make a huge difference in your maths exams. Whether you're doing algebra, geometry, or other topics, being fast and accurate with square roots gives you ...