- new parameter accepted for numeric scaling options nmbr/mnmx/mean/retn/DPrt as stdev_cap
- used to specify a cap/floor based on a specified number of standard deviations from the mean
- defaults to False, only inspected when prior parameters cap/floor are not specified
- hat tip for the inspiration to ACM paper "Automating Data Science" by Tijl De Bie, Luc De Raedt, José Hernández-Orallo, Holger H. Hoos, Padhraic Smyth, and Christopher K.I. Williams