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Kurtosis

Kurtosis is the degree of 'peakedness' of a continuous distribution. It is calculated from the formula:

The '3' is included in the formula to give the normal distribution a kurtosis of zero (some published versions do not include it).

A distribution with a kurtosis greater than zero is more peaky than a normal distribution and is 'Leptokurtic'. A distribution that is flatter than a normal distribution is 'Platykurtic'.

 MiC Quality offers online courses, including two courses in Statistics, the Primer in Statistics and the Advanced Statistics Course. Try out our courses by taking the first module of the Primer in Statistics free of charge.
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