Median

The middle value of scores arranged in numerical order; with an even number of scores, it is the mean of the two middle values.

The middle value when results are placed in numerical order. With an even number of results, it is the mean of the two middle values.

The mean, median and mode are measures of central tendency: they describe the centre or a typical value of a set of results. The range describes something different — how spread out the results are. It is a measure of dispersion.

The middle value when data are placed in order; for an even number of values, the average of the two middle values.

Put scores in numerical order before finding the median. With an even number of scores, calculate the mean of the two middle values.

State that the mean, median and mode are equal in a perfect normal distribution, not merely that they are all averages.

Equal mean, median and mode are consistent with a normal distribution, but do not by themselves prove that a dataset has a bell-shaped distribution.

The middle score when values are arranged in numerical order. If there are two middle scores, their mean is the median.

The mean, median and mode each do this differently. Dispersion describes how spread out the scores are. Using both gives a more useful summary than an average alone.

The middle score when scores are arranged in numerical order. With an even number of scores, it is the mean of the two middle scores.

Definition

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AQA GCSE Psychology · 8182

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OCR GCSE Psychology · J203