We May Consequently State The Fundamental Theorem

It Was Darwin's Chief Contribution, Not Only To Biology But To The Whole Of Natural Science, To Have Brought To Light A Process By Which Contingencies A Priori Improbable, Are Given, In The Process Of Time, An Increasing Probability, Until It Is Their Non-occurrence Rather Than Their Occurrence Which Becomes Highly Improbable.

Professor Eddington Has Recently Remarked That 'the Law That Entropy Always Increases - The Second Law Of Thermodynamics - Holds, I Think, The Supreme Position Among The Laws Of Nature'. It Is Not A Little Instructive That So Similar A Law [the Fundamental Theorem Of Natural Selection] Should Hold The Supreme Position Among The Biological Sciences.

... No Scientific Worker Has A Fixed Level Of Significance At Which From Year To Year, And In All Circumstances, He Rejects Hypotheses; He Rather Gives His Mind To Each Particular Case In The Light Of His Evidence And His Ideas.

[coining The Phrase "test Of Significance"] Critical Tests Of This Kind May Be Called Tests Of Significance, And When Such Tests Are Available We May Discover Whether A Second Sample Is Or Is Not Significantly Different From The First.

The Analysis Of Variance Is Not A Mathematical Theorem, But Rather A Convenient Method Of Arranging The Arithmetic.