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| 11. |
Laplace-normal mixtures fitted to wind shear data |
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Journal of Applied Statistics,
Volume 17,
Issue 2,
1990,
Page 271-276
P. N. Jones,
G. J. Mclachlan,
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PDF (298KB)
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摘要:
A mixture model with Laplace and normal components is fitted to wind shear data available in grouped form. A set of equations is presented for iteratively estimating the parameters of the model using an application of the EM algorithm. Twenty-four sets of data are examined with this technique, and the model is found to give a good fit to the data. Some hypotheses about the parameters in the model are discussed in light of the estimates obtained.
ISSN:0266-4763
DOI:10.1080/757582839
出版商:carfax publishing company
年代:1990
数据来源: Taylor
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| 12. |
Permutation tests for the independence of a scalar and a unit vector |
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Journal of Applied Statistics,
Volume 17,
Issue 2,
1990,
Page 277-281
Geoffrey S. Watson,
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PDF (254KB)
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摘要:
The problem of testing the independence of a scalar and a unit vector is re-examined in the context of a specific scientific problem which is described in Section 1. Several alternatives to the Jupp-Mardia (1980) statistic are suggested. The null distributions of all the statistics are discussed under permutations.
ISSN:0266-4763
DOI:10.1080/757582840
出版商:carfax publishing company
年代:1990
数据来源: Taylor
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