QQreflimits - Reference Limits using QQ Methodology
A collection of routines for finding reference limits
using, where appropriate, QQ methodology. All use a data
vector X of cases from the reference population. The default is
to get the central 95% reference range of the population,
namely the 2.5 and 97.5 percentile, with optional adjustment of
the range. Along with the reference limits, we want confidence
intervals which, for historical reasons, are typically at 90%
confidence. A full analysis provides six numbers: – the upper
and the lower reference limits, and - each of their confidence
intervals. For application details, see Hawkins and Esquivel
(2024) <doi:10.1093/jalm/jfad109>.
