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...
Box Plots What is a box plot? A box plot is a graph that clearly shows key statistics from a data set It shows the?median, quartiles, minimum?and?maximum values?and?outliers It does not show any ot...
Stem and Leaf Diagrams What is a stem and leaf diagram? A?stem?and?leaf?diagram shows?ALL?RAW?data and groups it into?class?intervals Stem and leaf diagrams lend themselves to two-digit data but ca...
