Muestreo

https://www.statisticshowto.datasciencecentral.com/probability-and-statistics/hypothesis-testing/margin-of-error/

Replicability

Ioannidis, Noseck et al
http://www.nature.com/nrn/journal/v14/n5/pdf/nrn3475.pdf


https://m.youtube.com/watch?v=uF1AF20R5as