Probability Formulae What is meant by probability formulae? If you have seen any of the other Revision Notes on probability, almost every one contains a formula These however are often disguised in...
Further Venn Diagrams What do you mean by further Venn diagrams? The Venn diagrams used here are no more complicated than those in the first?Venn Diagrams?revision note, however questions may use?s...
Further Tree Diagrams What do you mean by further tree diagrams? The tree diagrams used here are no more complicated than those in the first?Tree Diagrams?revision note, however more detailed use o...
Set Notation What is set notation? Set?notation?is a formal way of writing groups of numbers (or other mathematical entities such as shapes) that share a common feature – each number in a set is ca...
Combinations What is the difference between permutations and combinations? A?combination?is the number of possible arrangements of a set of objects when the?order?of the arrangements?does not matte...
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...
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...
