| 释义 |
platykurtic, a. Statistics.|plætɪˈkɜːtɪk|
[f. platy- + Gr. κυρτ-ός bulging + -ic.]
Of a frequency distribution or its graphical representation: having less kurtosis than the normal distribution.
1905[see leptokurtic a.]. 1937Yule & Kendall Introd. Theory Statistics (ed. 11) ix. 165 Platykurtic curves, like the platypus, are squat with short tails. Leptokurtic curves are high with long tails like the kangaroo—noted for ‘lepping’! 1952[see kurtosis]. 1966S. Beer Decision & Control xiii. 334 Moreover, the distributions may be either leptokurtic or platykurtic—that is, either too peaked or too flattened to be Gaussian. 1979Nature 25 Jan. 297/1 Platykurtosis is not sufficient to demonstrate bimodality, but bimodal distributions are platykurtic.
Hence ˌplatyˈkurtosis [kurtosis], the property of being platykurtic.
1939A. E. Treloar Elem. of Statistical Reasoning ii. 34 Positive (or lepto-) kurtosis, mesokurtosis (that of the ‘law of error’ or normal curve), and negative (or platy-) kurtosis mean simply that the clustering at the center is respectively greater than, equal to, or less than that of the normal curve. 1949[see leptokurtosis]. 1979[see above]. |