## On Cumulative Sums of Random Variables (Annals of Mathematical Statistics 15 No. 3 pp. 283 – 296, September 1944) and Sequential Tests of Statistical Hypotheses (Annals of Mathematical Statistics 16 No. 2 pp. 117 -186, June 1945).

1st Edition. FIRST EDITIONS IN MINT CONDITION AND IN ORIGINAL WRAPS of Abraham Wald’s seminal work on sequential tests of statistical hypotheses. Before Wald, the traditional style of statistical decision was to posit a hypothesis, make a predetermined number of measurements, then make a decision whether to accept or reject..... More