1. |
Statutory and Recommended List Trials of Crop Varieties in the United Kingdom |
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Journal of the Statistical Society of London,
Volume 143,
Issue 3,
2018,
Page 219-240
H. D. Patterson,
Valerie Silvey,
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摘要:
SummaryThe United Kingdom has recently set up a new system of crop variety performance trials to meet European Economic Community directives concerning the marketing of seeds. This has led to a reappraisal of statistical practices in statutory variety testing including trial design, methods of data analysis and allocation of resources. The paper describes some of the problems encountered and reports work done so far in resolving them. This work includes the construction of a catalogue of generalized lattice designs. A computer‐based system is used for routine data processing; it incorporates least squares procedures appropriate to incomplete varieties x trials tables. Much remains to be done in designing series of trials and interpreting their results.
ISSN:0959-5341
DOI:10.2307/2982128
出版商:Wiley
年代:2018
数据来源: WILEY
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2. |
Discussion of the Paper by Dr Patterson and Mrs Silvey |
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Journal of the Statistical Society of London,
Volume 143,
Issue 3,
2018,
Page 240-252
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ISSN:0959-5341
DOI:10.1111/j.2397-2327.1980.tb04169.x
出版商:Wiley
年代:2018
数据来源: WILEY
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3. |
Identification Keys and Diagnostic Tables: A Review |
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Journal of the Statistical Society of London,
Volume 143,
Issue 3,
2018,
Page 253-282
R. W. Payne,
D. A. Preece,
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摘要:
SummaryThe methodology and fields of application of identification keys and diagnostic tables are reviewed, consideration being given to both mathematical theory and practical requirements. Probabilistic and non‐probabilistic techniques are covered. The paper attempts a synthesis of a large and widely dispersed literature that is not properly integrated, in that workers in one field of application have often been unaware of relevant theory developed in other fields.
ISSN:0959-5341
DOI:10.2307/2982129
出版商:Wiley
年代:2018
数据来源: WILEY
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4. |
Discussion of the Paper by Mr Payne and Dr Preece |
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Journal of the Statistical Society of London,
Volume 143,
Issue 3,
2018,
Page 282-292
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ISSN:0959-5341
DOI:10.1111/j.2397-2327.1980.tb04171.x
出版商:Wiley
年代:2018
数据来源: WILEY
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5. |
A Statistical Analysis of Megalithic Data Under Elliptic Pattern |
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Journal of the Statistical Society of London,
Volume 143,
Issue 3,
2018,
Page 293-302
K. V. Mardia,
Dorothy Holmes,
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摘要:
SummaryWe examine Thorn's hypothesis that some Megalithic sites were constructed in an elliptic pattern. For this objective we propose a model which describes data clustered around an ellipse. The model incorporates a parameter of concentration about the ellipse. We give some characterizations of the model and a test is developed to discriminate between circular and elliptical patterns. Fitted values from this method are compared with those of Thorn. Alternative models for the circular case are proposed and compared.
ISSN:0959-5341
DOI:10.2307/2982130
出版商:Wiley
年代:2018
数据来源: WILEY
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6. |
Chi‐Squared Tests with Survey Data |
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Journal of the Statistical Society of London,
Volume 143,
Issue 3,
2018,
Page 303-320
D. Holt,
A. J. Scott,
P. D. Ewings,
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摘要:
SummaryIt is usually unrealistic to regard observations from a complex survey as independent, but practitioners often use standard chi‐squared tests with survey data. We look at the effect of correlations among elements on the performance of the tests. Empirical results are given for two national surveys which suggest that the effect is severe for tests of goodness‐of‐fit or homogeneity but less severe for tests of independence.
ISSN:0959-5341
DOI:10.2307/2982131
出版商:Wiley
年代:2018
数据来源: WILEY
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7. |
Seasonal Adjustment by Signal Extraction |
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Journal of the Statistical Society of London,
Volume 143,
Issue 3,
2018,
Page 321-337
J. P. Burman,
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摘要:
SummaryIf an arima model has been fitted to a time series, the model spectrum can be partitioned into trend, seasonal and irregular components. The corresponding linear filters are used for signal extraction to provide a theoretically based method of seasonal adjustment. The flexibility, stability and residual seasonality obtained by this method and two others are compared empirically.
ISSN:0959-5341
DOI:10.2307/2982132
出版商:Wiley
年代:2018
数据来源: WILEY
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8. |
Conjectured Models for Trends in Financial Prices, Tests and Forecasts† |
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Journal of the Statistical Society of London,
Volume 143,
Issue 3,
2018,
Page 338-362
Stephen J. Taylor,
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摘要:
SummaryA new set of statistical models is defined for time series of the daily prices of financial assets, such as commodities, currencies and stocks. The models resemble a random walk, but include a price‐trend term for which formal stochastic processes are conjectured. The price‐trend term is interpreted as the response to changes in the anticipated supply and demand of the asset.The price‐trend models possess a distinctive form of theoretical autocorrelation, which allows tests between the random walk hypothesis and a price‐trend hypothesis to be performed. Tests applied to eight long series of London commodity prices, an American commodity series and a series of currency exchange rates, lead to the rejection of the random walk hypothesis for both commodities and currencies. It is argued that the price‐trend models describe the data better.Estimates of the model parameters are obtained and interpreted. Optimal linear forecasts are presented and assessed empirically and their applications are reviewed.The paper also covers the fluctuating‐variance property of daily returns, the choice of a powerful statistic to test the random walk hypothesis and methods of testing some variants of the random walk proposed in the literature.
ISSN:0959-5341
DOI:10.2307/2982133
出版商:Wiley
年代:2018
数据来源: WILEY
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9. |
A Note on Labouchere Sequences |
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Journal of the Statistical Society of London,
Volume 143,
Issue 3,
2018,
Page 363-366
F. Downton,
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摘要:
SummaryThe Labouchere system of betting in roulette (and other games of chance) has a long, although necessarily unsuccessful, history. Nevertheless, claims for the success of the system and its derivatives are still made and little attempt at a probability analysis appears to have been made. In this note the distribution of the length of runs leading to success in the Labouchere (and to failure in the reverse Labouchere) system is obtained.
ISSN:0959-5341
DOI:10.2307/2982134
出版商:Wiley
年代:2018
数据来源: WILEY
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10. |
A Note on the Accuracy of Forecasting: Opinion Polls |
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Journal of the Statistical Society of London,
Volume 143,
Issue 3,
2018,
Page 367-368
Norman L. Webb,
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ISSN:0959-5341
DOI:10.2307/2982135
出版商:Wiley
年代:2018
数据来源: WILEY
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