A-Level Edexcel Mathematics A2 S2.2.2 - Probability density function Topic Practice

• 2.2 The probability density function Use of the probability density function f(x), where and the cumulative distribution b function for a continuous random P(a < X  b) = ∫ f(x) dx. variable. a Use of the cumulative distribution function ∫ x0 F(x 0) = P(X  x 0) = f(x) dx. −∞ The formulae used in defining f(x) will be restricted to simple polynomials which may be expressed piecewise.