The GUM on your PDA

摘要

The Personal Digital Assistant (PDA) has been used for a number of years for technical field work instead of a laptop computer. A PDA can conveniently also be used for uncertainty of measurement calculations, however the implementation of EXCEL~(TM) on current PDAs does not duplicate all of the useful functions found in the normal Microsoft implementation. This paper address the issue of the missing TINV function, locking of sheets and the use of "hidden" sheets. An algorithm is presented to calculate the value of Student's t for any number of degrees of freedom for a 95percent confidence level.