Download e-book for iPad: Applied statistics: principles and examples by David Roxbee Cox, E. J. Snell

By David Roxbee Cox, E. J. Snell

ISBN-10: 0412165708

ISBN-13: 9780412165702

This e-book could be of curiosity to senior undergraduate and postgraduate scholars of utilized facts.

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10). 8] Some types of statistical procedure 41 (iii) Very occasionally it is misleading to give an interval of values because, for example, two disjoint intervals of values may well be consistent with the data, the intermediate values being inconsistent. Then a generalized idea, namely of confidence regions, is called for. (iv) If there are several ways of calculating intervals with the right probability of covering the true value, theoretical arguments are normally used to find which method produces the most sensitive analysis, in the sense of confidence intervals that are as selective as possible.

Indeed, in the long term this is a sensibly cautious approach, but in subjects where data take a long time to obtain some assessment of significance in the initial investigation, even if its interest is ultimately temporary, can still be valuable. 1 Introduction ' The objective of statistical analysis is to discover what conclusions can be drawn from data and to present these conclusions in as simple and lucid a form as is consistent with accuracy. 4, there will typically be a number of phases to the analysis.

That the mean yields are the same, but the hypothesis that 8 = 0 may be of Interest in that it divides the situations in which the first process has the higher mean yield from those in which it has the lower. So long as the data are reasonably consistent with H 0 the direction of the difference between the mean yields is not clearly established. In technological applications this second kind of null hypothesis is the more common. One important use of significance tests is in the preliminary phase of an analysis as a guide to choice of models.

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Applied statistics: principles and examples by David Roxbee Cox, E. J. Snell

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