Statistical Concepts and Algorithms

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ALGORITHM

Back

A step-by-step procedure for solving a problem

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MEAN

Back

The average of a distribution, obtained by adding the scores and then dividing by the number of scores

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MEDIAN

Back

The middle score in a distribution; half the scores are above it and half are below it

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MODE

Back

The most frequently occurring score(s) in a distribution

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POLYGON

Back

A closed plane figure made up of line segments

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REFLECT

Back

A transformation where each point of a shape is mirrored to a position the same distance from an axis of symmetry.

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ROTATE

Back

A transformation where each point in the plane is rotated through a given angle about a fixed point in the plane (the centre of rotation).

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STEM-AND-LEAF PLOT

Back

A method of organizing and displaying numerical data in which each data value is split into 2 parts: a 'stem' and a 'leaf'. These plots give a visual indication of spread.

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TRANSLATE

Back

Shifting a figure in the plane without turning it. Translations can be specified as a combination of a horizontal shift and a vertical shift.

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OUTLIER

Back

A value that 'lies outside' (is much smaller or larger than) most of the other values in a data set.