Permutations Are permutations and arrangements the same thing? Mathematically speaking yes, a permutation is the number of possible arrangements of a set of objects when the order of the arrangemen...
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Arrangements How many ways can n different objects be arranged? When considering how many ways you can arrange a number of different objects in a row it’s a good idea to think of how many of the ob...
Tree Diagrams What is a tree diagram? A tree diagram is used to show the (combined) outcomes of more than one event that happen one after the other help calculate probabilities when AND and/or OR’s...
Venn Diagrams What is a Venn diagram? A Venn diagram is a way to illustrate events and are particularly useful when outcomes overlap Venn diagrams are mostly used for 2 or 3 events A Venn diagram c...
Probability Basics What do I need to know about probability for AS and A level Mathematics? The language used in probability can be confusing so here are some definitions of commonly misunderstood ...
Skewness The distribution of a data set is either symmetrical or it has skewness. What is skewness? Skewness describes the way in which data in a non – symmetrical distribution is leaning A distrib...
Interpreting Data You may be asked to comment on how statistics could affect data or how removing or adding a new piece of data could change statistics you have calculated. You may also be asked to...
Histograms What is a histogram? A histogram is similar to a bar chart but with some key differences A histogram is for displaying grouped continuous data whereas a bar chart is for discrete or qual...
