https://sdparsons.r-universe.dev/splithalfhttps://sdparsons.r-universe.dev/api/packages/splithalfhttps://sdparsons.r-universe.dev/splithalf/splithalf.pdfhttps://sdparsons.r-universe.dev/splithalf/doc/manual.htmlhttps://sdparsons.r-universe.dev/splithalf/NEWShttps://sdparsons.r-universe.dev/splithalf/NEWS.txthttps://sdparsons.r-universe.dev/splithalf/citationhttps://sdparsons.r-universe.dev/splithalf/citation.txthttps://sdparsons.r-universe.dev/splithalf/citation.cffhttps://sdparsons.r-universe.dev/splithalf/doc/sim-validation.Rmdhttps://sdparsons.r-universe.dev/articles/splithalf/sim-validation.html