* DOC: stats: clarify burr/fisk distribution PDFs (#14003)
* DOC: stats: clarify burr/fisk distribution PDFs (#14003)

* DOC: stats: clarify burr/fisk distribution PDFs

Co-authored-by: Matt Haberland <1f6e3f9dd4f3b851e1c9f994a33220fb712394f1@calpoly.edu>
scipy/scipy,andyfaff/scipy,vigna/scipy,Stefan-Endres/scipy,rgommers/scipy,endolith/scipy,andyfaff/scipy,andyfaff/scipy,WarrenWeckesser/scipy,vigna/scipy,rgommers/scipy,endolith/scipy,andyfaff/scipy,rgommers/scipy,Stefan-Endres/scipy,WarrenWeckesser/scipy,vigna/scipy,ilayn/scipy,scipy/scipy,mdhaber/scipy,perimosocordiae/scipy,scipy/scipy,vigna/scipy,scipy/scipy,anntzer/scipy,mdhaber/scipy,perimosocordiae/scipy,vigna/scipy,andyfaff/scipy,scipy/scipy,Stefan-Endres/scipy,mdhaber/scipy,perimosocordiae/scipy,ilayn/scipy,WarrenWeckesser/scipy,WarrenWeckesser/scipy,anntzer/scipy,anntzer/scipy,perimosocordiae/scipy,rgommers/scipy,scipy/scipy,anntzer/scipy,ilayn/scipy,mdhaber/scipy,WarrenWeckesser/scipy,anntzer/scipy,perimosocordiae/scipy,endolith/scipy,anntzer/scipy,mdhaber/scipy,ilayn/scipy,Stefan-Endres/scipy,endolith/scipy,Stefan-Endres/scipy,WarrenWeckesser/scipy,endolith/scipy,endolith/scipy,mdhaber/scipy,perimosocordiae/scipy,ilayn/scipy,Stefan-Endres/scipy,rgommers/scipy,ilayn/scipy,andyfaff/scipy