A Level Math S1 (Probability and Statistics 1) complete revision

A complete revision of Cambridge A Level Math 9709 Paper 5 (Probability and Statistics 1, usually called S1) in one video. It covers concepts and question types for probability, permutations and combinations, representation of data, discrete random variables (including the binomial and geometric distributions) and the normal distribution.

Use the chapter list to jump straight to the topic you want.

Chapters

Press a chapter and the video starts at that topic.

1. 0:00ProbabilityThe probability formula, tree diagrams, mutually exclusive and independent events, conditional probability, and questions with missing probabilities.Quiz
2. 1:08:55Permutations and CombinationsArrangements with repeated letters, keeping items together or apart, using nPr and nCr, forming numbers, selecting groups, and finding probabilities with them.Quiz
3. 2:59:49Representation of DataMean, median, quartiles and standard deviation, grouped data, histograms, stem-and-leaf diagrams, cumulative frequency, box plots, outliers and comparing data sets.Quiz
4. 4:33:27Discrete Random Variables (including Binomial and Geometric Distributions)Probability distribution tables, expectation and variance, the binomial and geometric distributions, and “at least” and “least value of n” questions.Quiz
5. 6:09:06Normal DistributionUsing the normal table, standardising, inverse normal, finding an unknown mean or standard deviation, two-sided intervals, and combining the normal with the binomial.Quiz

How to use this video

1. Pick the topic you want to revise and start there, rather than watching from the top.
2. Pause before each worked question and try it yourself first.
3. Note any topic that still feels shaky, then practise it with topical past paper questions.