https://openintrostat.r-universe.dev/openintrohttps://openintrostat.r-universe.dev/api/packages/openintrohttps://openintrostat.r-universe.dev/openintro/openintro.pdfhttps://openintrostat.r-universe.dev/openintro/doc/manual.htmlhttps://openintrostat.r-universe.dev/openintro/NEWShttps://openintrostat.r-universe.dev/openintro/NEWS.txthttps://openintrostat.r-universe.dev/openintro/citationhttps://openintrostat.r-universe.dev/openintro/citation.txthttps://openintrostat.r-universe.dev/openintro/citation.cffhttps://openintrostat.r-universe.dev/openintro/doc/datasets.Rmdhttps://openintrostat.r-universe.dev/articles/openintro/datasets.html