1. |
Simulating the Ley Hunter |
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Journal of the Statistical Society of London,
Volume 143,
Issue 2,
2018,
Page 109-126
Simon Broadbent,
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摘要:
SummaryMegalithic sites, especially isolated standing stones, are believed by some to have been deliberately set out in straight lines known as leys. An alternative hypothesis is that these points are uniformly and independently distributed. The statistic proposed to test the uniform hypothesis is the number of triads of points which are nearly linear, i.e. the largest angle of the triangle they define is within a small (acceptance) angle of 180°.This statistic is examined for points within a rectangular boundary and a limiting formula is given for its mean. Simulations confirm that its distribution is approximately normal and that we can use the formula for the mean and one derived by Kendall and Kendall (1980) for the variance for acceptance angles as large as 1°.The simulations also suggest approximate formulae for the mean and variance of tetrads (four points, any three of which form a triad) and for the mean of pentads (a similar definition for five points).The triad and tetrad data from 52 sites in Cornwall are analysed. These suggested leys are in fact shown to be consistent with the overall density distribution of the sites.
ISSN:0959-5341
DOI:10.2307/2981985
出版商:Wiley
年代:2018
数据来源: WILEY
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2. |
Discussion of Dr Broadbent's Paper |
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Journal of the Statistical Society of London,
Volume 143,
Issue 2,
2018,
Page 126-140
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ISSN:0959-5341
DOI:10.1111/j.2397-2327.1980.tb04145.x
出版商:Wiley
年代:2018
数据来源: WILEY
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3. |
The Analysis of Re‐Employment Probabilities for the Unemployed |
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Journal of the Statistical Society of London,
Volume 143,
Issue 2,
2018,
Page 141-152
Tony Lancaster,
Stephen Nickell,
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摘要:
SummaryThis paper is concerned with the modelling and estimation of the process covering the rate at which unemployed individuals leave unemployment. In particular it discusses the problems caused by unobservables in the estimation procedure and ways in which these problems may be attacked. Finally it comes to some rather pessimistic conclusions concerning the identification of the true process in the presence of unmeasured heterogeneity in the population.
ISSN:0959-5341
DOI:10.2307/2981986
出版商:Wiley
年代:2018
数据来源: WILEY
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4. |
Discussion of the Paper by Professors Lancaster and Nickell |
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Journal of the Statistical Society of London,
Volume 143,
Issue 2,
2018,
Page 152-165
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ISSN:0959-5341
DOI:10.1111/j.2397-2327.1980.tb04147.x
出版商:Wiley
年代:2018
数据来源: WILEY
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5. |
Opinion Polls |
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Journal of the Statistical Society of London,
Volume 143,
Issue 2,
2018,
Page 166-166
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ISSN:0959-5341
DOI:10.2307/2981987
出版商:Wiley
年代:2018
数据来源: WILEY
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6. |
Density Estimation and Suicide Risks in Psychiatric Treatment† |
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Journal of the Statistical Society of London,
Volume 143,
Issue 2,
2018,
Page 167-176
J. B. Copas,
M. J. Fryer,
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摘要:
SummaryUsing techniques of density estimation, an estimate is made of the risk of suicide as a function of time under psychiatric treatment. Data from the Mental Health Enquiry, and also from a local study involving the selection of matched controls, are considered, and the dependence on sex and age investigated. In most cases, risk decreases at a rate roughly inversely proportional to the square root of time.
ISSN:0959-5341
DOI:10.2307/2981988
出版商:Wiley
年代:2018
数据来源: WILEY
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7. |
Calibration, Cross‐Validation and Carbon‐14. Ii |
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Journal of the Statistical Society of London,
Volume 143,
Issue 2,
2018,
Page 177-194
R. M. Clark,
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摘要:
SummaryRadiocarbon measurements on tree‐ring‐dated wood have demonstrated the need for a calibration curve for carbon‐14 dates. Part I of this paper (Clark, 1979) discussed the practical aspects of the construction and use of such a calibration curve, as well as some of its geophysical and archaeological implications. In Part II, we consider the corresponding general problems of estimating a smooth regression function, and of calibration using possibly biased estimators of the regression function. The cross‐validation mean‐square‐error is proposed not only as a criterion for selecting an appropriate regression estimator but also as a device for estimating the average bias of the chosen estimator. In order to compensate, to some extent, for any such bias, an adjustment is proposed to both prediction intervals and confidence intervals, in which the variance of the corresponding residual is replaced by its estimated average mean‐square‐error. Theoretical calculations and simulation experiments indicate that, for calibration using possibly biased regression estimators, it is preferable to make this simple adjustment for average bias than simply to hope that the bias is everywhere zero.
ISSN:0959-5341
DOI:10.2307/2981989
出版商:Wiley
年代:2018
数据来源: WILEY
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8. |
Philosophical Problems of Statistical Inference. Learning from R. A. Fisher |
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Journal of the Statistical Society of London,
Volume 143,
Issue 2,
2018,
Page 195-195
F. H. C. Marriott,
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摘要:
1. Philosophical Problems of Statistical Inference. Learning from R. A. Fisher.By T. Seidenfeld. Dordrecht, Reidal, 1979. xiii, 254 p. 23 cm. $36.85.
ISSN:0959-5341
DOI:10.2307/2981990
出版商:Wiley
年代:2018
数据来源: WILEY
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9. |
The Economics of Modern Britain. An Introduction to Macroeconomics |
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Journal of the Statistical Society of London,
Volume 143,
Issue 2,
2018,
Page 196-197
Margaret Wilkinson,
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摘要:
3. The Economics of Modern Britain. An Introduction to Macroeconomics.By John Black. Oxford, Martin Robertson, 1979. xiv, 272 p. 22 cm. £10.00 hardbound, £3.95 paper bound.
ISSN:0959-5341
DOI:10.2307/2981992
出版商:Wiley
年代:2018
数据来源: WILEY
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10. |
Models and Decision Making in National Economies |
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Journal of the Statistical Society of London,
Volume 143,
Issue 2,
2018,
Page 197-198
Judith Yates,
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摘要:
4. Models and Decision Making in National Economies.Edited by J. M. L. Janssen, L. F. Pau and A. Straszak. Amsterdam, North Holland, 1979. ix, 425 p. 26 cm. $68.25.
ISSN:0959-5341
DOI:10.2307/2981993
出版商:Wiley
年代:2018
数据来源: WILEY
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