A Methodology for the Health Sciences - part 7 potx
A Methodology for the Health Sciences - part 7 potx
... [1 974 ]. This paper considers heartbeats that have an irregular rhythm (or arrythmia). The study examined the administration of the drug procainamide and evaluated variables associated with the ... start of the study but suggested by the data. Other terms associated with such analyses are data driven and subgroup analysis. Aside from the assignment of appropriate p-values, ther...
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A Methodology for the Health Sciences - part 6 potx
... into halves at random. One can estimate the parameters from one-half of the data and then predict the values for the remaining unused half of the data. The evaluation of the fit can be performed ... accept the quadratic equation as appropriate. Figure 11.5 is a scatter diagram of the data as well as the linear and quadratic curves. Note that the quadratic curve is hig...
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A Methodology for the Health Sciences - part 1 doc
... 9 REFERENCES Battezzati, M., Tagliaferro, A. , and Cattaneo, A. D. [1959]. Clinical evaluation of bilateral internal mam- mary artery ligation as treatment of coronary heart disease. American Journal of Cardiology, ... We use a capital letter for the name of a variable and the corresponding lowercase letter for a value. For example, Y = a atoxin level (the name of the va...
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A Methodology for the Health Sciences - part 2 pptx
... is from the hypothesized parameter value, the smaller the area (probability) in the tail. This tail probability is usually called the p-value. For example (using Table A. 2), the area to the right ... statistically independent random variables, then for any two constants a 1 and a 2 , the random variable W = a 1 Y 1 + a 2 Y 2 has mean and variance E(W ) = a 1 E(...
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A Methodology for the Health Sciences - part 3 pps
... Distribution Normal Approximation to the Poisson Distribution The Poisson distribution has the property that the mean and variance are equal. For the mean large, say ≥ 100, the normal approximation can be ... weight, what is the exact two-sided p-value for testing the null hypothesis π = 1/2? 6.3 Edwards and Fraccaro [1960] present Swedish data about the gender of a ch...
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A Methodology for the Health Sciences - part 4 pot
... before a category with K tied observations, the average rank for the k tied observations is average rank = 2J + K + 1 2 (9) For these data, the average ranks are computed as follows: KJAverage ... 5. 977 6x,wherex is the latitude at the center of the state. that is, the total variation as measured by (y i − y) 2 has been partitioned additively into a part attributabl...
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A Methodology for the Health Sciences - part 5 pdf
... Buchanan. ONE-WAY ANALYSIS OF VARIANCE 361 10.2.2 Using the Normal Distribution Model Basic Approach The one-way analysis of variance is a generalization of the t-test. As in the motivating example above, ... the same as that of the analysis of variance in Section 10.3.2. Note also that the ranking of treatments in terms of the total ranks is the same as in Table 10.11. F...
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A Methodology for the Health Sciences - part 8 ppt
... COMPONENT ANALYSIS AND FACTOR ANALYSIS 1. Varimax method. The varimax method uses the idea of maximizing the sum of the vari- ances of the squares of loadings of the factors. Note that the variances are ... total), calculate standardized death rates for halothane and cyclopropane. Are the standardized rates significantly different? (c) Calculate the standardized mortality r...
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A Methodology for the Health Sciences - part 9 pps
... “maintain” the favorable status. Statistical inference can be based on standard two-sample methods for binary data (see Chapter 6). An analysis that summarizes current status at follow- up stratifying ... observa- tions that are two visits apart have correlation ρ 2 , and in general all pairs of observations that are k visits apart have correlation ρ k . A banded correlation matrix will...
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A Methodology for the Health Sciences - part 10 pps
... 273 , 70 2, 70 7, 70 8, 79 1, 814, 816 Alderman, M. H., 816 Allan, I. D., 659 Amato, D. A. , 76 5 American Statistical Association, 76 7, 78 3 Anderson, J. A. , 569, 578 , 582 Anderson, G. D., 70 7 Annegers, ... seemed strange to me because the panel had not indicated that the drug, tPA, was bad but only that in a number of areas the data needed to be gathered and analyzed m...
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