leptokurticadj.

/lɛptəʊˈkəːtɪk/

Etymology: < lepto- comb. form + Greek κυρτός bulging + -ic suffix.

Statistics.

Of a frequency distribution or its graphical representation: having greater kurtosis than the normal distribution.

ΘΚΠ

the world > relative properties > number > probability or statistics > [adjective] > relating to distribution > measure of peakedness

leptokurtic1905

mesokurtic1905

platykurtic1905

1905 K. Pearson in Biometrika 4 173 Given two frequency distributions which have the same variability as measured by the standard deviation, they may be relatively more or less flat-topped than the normal curve. If more flat-topped I term them platykurtic, if less flat-topped leptokurtic, and if equally flat-topped mesokurtic.

1954 Brit. Jrnl. Psychol. 45 96 These curves were clearly leptokurtic as well as skewed.

1966 New Scientist 28 July 213/1 The leptokurtic or ‘peaked’ distributions that geodesists often meet with.

Derivatives

ˌleptokurˈtosis n. [kurtosis n.] the property of being leptokurtic.

ΚΠ

1907 London, Edinb. & Dublin Philos. Mag. 6th Ser. 13 372 There is..sensible skewness and sensible leptokurtosis.

1937 G. U. Yule & M. C. Kendall Introd. Theory Statistics (ed. 11) ix. 165 (note) By a slip leptokurtosis is there [i.e. in Biometrika (1905) IV. 169 ff.] inadvertently applied to distributions for which β₂ < 3 [instead of β₂ > 3].

1949 C. D. Darlington & K. Mather Elements of Genetics 401 Kurtosis, the departure of a symmetrical frequency distribution from the normal by excess (platykurtosis) or deficiency (leptokurtosis) in its shoulders as opposed to tails and centre.

This entry has not yet been fully updated (first published 1976; most recently modified version published online March 2018).

单词	leptokurtic
释义	leptokurticadj. /lɛptəʊˈkəːtɪk/ Etymology: < lepto- comb. form + Greek κυρτός bulging + -ic suffix. Statistics. Of a frequency distribution or its graphical representation: having greater kurtosis than the normal distribution. ΘΚΠ the world > relative properties > number > probability or statistics > [adjective] > relating to distribution > measure of peakedness leptokurtic1905 mesokurtic1905 platykurtic1905 1905 K. Pearson in Biometrika 4 173 Given two frequency distributions which have the same variability as measured by the standard deviation, they may be relatively more or less flat-topped than the normal curve. If more flat-topped I term them platykurtic, if less flat-topped leptokurtic, and if equally flat-topped mesokurtic. 1954 Brit. Jrnl. Psychol. 45 96 These curves were clearly leptokurtic as well as skewed. 1966 New Scientist 28 July 213/1 The leptokurtic or ‘peaked’ distributions that geodesists often meet with. Derivatives ˌleptokurˈtosis n. [kurtosis n.] the property of being leptokurtic. ΚΠ 1907 London, Edinb. & Dublin Philos. Mag. 6th Ser. 13 372 There is..sensible skewness and sensible leptokurtosis. 1937 G. U. Yule & M. C. Kendall Introd. Theory Statistics (ed. 11) ix. 165 (note) By a slip leptokurtosis is there [i.e. in Biometrika (1905) IV. 169 ff.] inadvertently applied to distributions for which β₂ < 3 [instead of β₂ > 3]. 1949 C. D. Darlington & K. Mather Elements of Genetics 401 Kurtosis, the departure of a symmetrical frequency distribution from the normal by excess (platykurtosis) or deficiency (leptokurtosis) in its shoulders as opposed to tails and centre. This entry has not yet been fully updated (first published 1976; most recently modified version published online March 2018). < adj.1905
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