Of the quantities p1, p2, x1, x2, 1, 2, and , which represent parameters and which represent statistics?
a) p1, p2, x1, x2 - Parameters; 1, 2, - Statistics
b) p1, p2 - Parameters; x1, x2, 1, 2 - Statistics
c) x1, x2 - Parameters; p1, p2, 1, 2 - Statistics
d) 1, 2, - Parameters; p1, p2, x1, x2 - Statistics