“This is the us…

“This is the usual difference between a probability definition and a statistics definition. The probability definition deals with one probability structure, but the statistics definition deals with an entire family.” – Casella & Berger p. 468, section 10.1 #C&B

Casella, George, and Roger L. Berger. Statistical inference. Vol. 70. Belmont, CA: Duxbury Press, 1990.