Абрахам Валд и статистическите изследвания върху самолетните брони
Abraham Wald and Statistical Research on Aircraft Armor

Summary/Abstract: This work investigates the actual and the legendary scientific research of Abraham Wald on the survival probabilities of planes with different number of hits from enemy fire. We give new explanation to the deduction of his basic equation. We explain his basic assumptions and their role in the process of derivation, which we display in more detail. We investigate the role of intuition in this statistical study and how ignoring it allows to formulate assumptions and derive equation about missing data, which is unknowable in the strict sense of the term. We discuss the roles of estimations for unknowable or unobservable variables and highlight the methodology of sequential relaxations of estimations for recursive approximation of real-world data by successive theoretical models.

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