In their 1933 paper , Jerzy Neyman and Egon Pearson recommended that the significance level ( e.g. 0.05 ) , which they called α , be set ahead of time , prior to any data collection .
In their 1933 paper , Jerzy Neyman and Egon Pearson recommended that the significance level ( e.g. 0.05 ) , which they called α , be set ahead of time , before any data collection .