This worksheet is divided into 6 sections, containing key practice questions and conceptual questions that students are expected to be able to do: Normal probability density function - known mean and s.d. 68-95-99.7 Empirical Rule Standard normal distribution / z-distribution Inverse normal distribution Finding unknown mean or s.d. Four long exam-style questions Answer pdf is included in a separate file. Welcome any feedback on this pack so that I can produce better question packs on other A level Maths topics.