Video lessons for OCR A Level Maths 2.1 Statistical Sampling, covering 2.1.1 Population and sample, 2.1.2 Informal inferences from samples, 2.1.3 Sampling techniques, 2.1.4 Selecting or critiquing sampling techniques, and 2.1 Statistical Sampling. 3 lessons matched to the OCR A Level Maths (H240) specification, each working through the content and then applying it to exam-style questions in Paper 1, Paper 2 and Paper 3 format. Suitable for A Level Maths.