theorem, that the sum of independent random variables converges to the normaldistribution [Hui and Iverson 2004; Hui 2016b, §F]. t←¯1+{≢⍵}⌸(⍳51),(4×⍳50)⍸+⌿
Environment Institute, Working Paper No. 16–1 Jan (2016) Economists Sharply Split Over Trade Deal Effects (页面存档备份,存于互联网档案馆) J. Calmes, The New York Times