| 释义 |
leptokurtic, a. Statistics.|lɛptəʊˈkɜːtɪk|
[f. lepto- + Gr. κυρτ-ός bulging + -ic.]
Of a frequency distribution or its graphical representation: having greater kurtosis than the normal distribution.
1905K. Pearson in Biometrika IV. 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. 1954Brit. Jrnl. Psychol. XLV. 96 These curves were clearly leptokurtic as well as skewed. 1966New Scientist 28 July 213/1 The leptokurtic or ‘peaked’ distributions that geodesists often meet with.
Hence ˌleptokurˈtosis [kurtosis], the property of being leptokurtic.
1907Phil. Mag. XIII. 372 There is..sensible skewness and sensible leptokurtosis. 1937Yule & Kendall Introd. Theory Statistics (ed. 11) ix. 165 By a slip leptokurtosis is there [sc. in Biometrika (1905) IV. 169 ff.] inadvertently applied to distributions for which β2 2 > 3]. 1949Darlington & Mather Elem. 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. |