<Li> Random fields . These represent the extension of random processes to multiple dimensions, and are common in physics, where they are used in statistical mechanics to describe properties such as force or electric field that can vary continuously over three dimensions (or four dimensions, when time is included). </Li> <P> These concepts originate in various scientific fields and frequently overlap in usage . As a result, it is very often the case that multiple concepts could potentially be applied to the same problem . </P>

What is the type of data that involves numbers