Kurtosis/Definition: Difference between revisions
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imported>Nick Gardner (New page: <noinclude>{{Subpages}}</noinclude> a mathematical expression defining the shape of a symmetrical probability distribution curve - sometimes referred to as "peakiness". It is sometimes adj...) |
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a mathematical expression defining the shape of a symmetrical probability distribution curve - sometimes referred to as "peakiness". It is sometimes adjusted to make the kurtosis of a ''normal distribution as zero (although some mathematicians then call it "excess kurtosis") Positive kurtosis then means that more of the ''variance'' is due to infrequent extreme deviations, | a mathematical expression defining the shape of a symmetrical probability distribution curve - sometimes referred to as "peakiness". It is sometimes adjusted to make the kurtosis of a ''normal distribution'' as zero (although some mathematicians then call it "excess kurtosis"). Positive kurtosis then means that more of the ''variance'' is due to infrequent extreme deviations, rather than to frequent modestly-sized deviations. | ||
Revision as of 16:01, 23 May 2009
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Kurtosis [r]: a mathematical expression defining the shape of a symmetrical probability distribution curve - sometimes referred to as "peakiness". It is sometimes adjusted to make the kurtosis of a normal distribution as zero (although some mathematicians then call it "excess kurtosis"). Positive kurtosis then means that more of the variance is due to infrequent extreme deviations, rather than to frequent modestly-sized deviations.