forecasting methods for serial data

... Statistical Methods for Survival Data Analysis Statistical Methods for Survival Data Analysis Third Edition ELISA T LEE JOHN WENYU WANG Department of Biostatistics and Epidemiology and Center for American ... edition of Statistical Methods for Survival Data Analysis is intended to provide a comprehensive introduction of the most commonly used methods for analyzing survival data It begins with basic ... electronic formats Some content that appears in print, however, may not be available in electronic format Library of Congress Cataloging-in-Publication Data: Lee, Elisa T Statistical methods for survival...

Ngày tải lên: 29/06/2014, 10:20

... Statistical Methods for Survival Data Analysis Statistical Methods for Survival Data Analysis Third Edition ELISA T LEE JOHN WENYU WANG Department of Biostatistics and Epidemiology and Center for American ... edition of Statistical Methods for Survival Data Analysis is intended to provide a comprehensive introduction of the most commonly used methods for analyzing survival data It begins with basic ... electronic formats Some content that appears in print, however, may not be available in electronic format Library of Congress Cataloging-in-Publication Data: Lee, Elisa T Statistical methods for survival...

Ngày tải lên: 14/08/2014, 05:20

... known Therefore, we suggest using nonparametric methods to analyze survival data before attempting to fit a theoretical distribution If the main objective is to find a model for the data, estimates ... Nonparametric Methods of Estimating Survival Functions In this chapter we discuss methods of estimating the three survival (survivorship, density, and hazard) functions for censored data Unfortunately, ... interval ( q ) The information is obtained from census data For R V example, ( q ) for age interval 20—21 is the proportion of persons who R V died on or after their 20th birthday and before their 21st...

Ngày tải lên: 14/08/2014, 05:20

... >) is equal to e(t ) for t - t> Thus w for censored G G H H G observations t> equals 9e(t ), where t - t> For example, w for 16> is G G H H G 9e(15), or 90.100, and that for 18> is 9e(18), or ... the data in each row are for the same patient The following SAS code can be used to perform the logrank test data w1; infile ‘c:!d5d1.dat’ missover; input t cens treat; run; proc lifetest data ... (1964) suggests using the scores t , , t as before for the failures and L NL t for all censored observations The mean score, for example, for the N> L first group is r t  ; (n r )t  ...

Ngày tải lên: 14/08/2014, 05:20

... estimation of by maximum likelihood methods for data without censored observations will be given first followed by the case with censored observations Estimation of for Data without Censored Observations ... and  for samples with and without censored observations 7.4.1 Estimation of and for Data without Censored Observations Estimations of and  for complete samples by maximum likelihood methods ... interval for computed from (7.2.33) is 2(600) 2(600) : : 31.526 8.231 or (38.064, 145.790) When data are progressively censored, Gehan (1970) derives an estimate for G and a modified MLE for the...

Ngày tải lên: 14/08/2014, 05:20

... time data observed from rats fed with saturated diets in Table 3.4 We select the lognormal distribution for this —   217 set of data for illustrative purposes Using methods ... * * @A : 9log for the exponential and the extended generalized gamma, :9(1/ ) log for the Weibull, : for the lognormal, and :9(1/ ) log for the log-logistic distribution A B : 1/ for the Weibull ... vertically down to the data scale to read the estimate of the median For the WBC data, an estimate of the population median is 65,000 The median is a representative of nominal value for the population...

Ngày tải lên: 14/08/2014, 05:20

... critical if 1% of data for one independent variable is missing than if 40% of data for several independent variables is missing When a substantial proportion of subjects has missing data for a variable, ... surviving a given time  G for rats fed with any of the diets For example, for rats fed a low-fat diet,    273 Table 11.3 Analysis Results for Rat Data in Table 3.4 Using a ... gamma model on lung cancer data set wb; model : ‘Weibull’; data wc; set wc; model : ‘LNnormal’; data wd; set wd; model : ‘Gamma’; data we; set we; model : ‘LLogistic’; data w2; set wa wb wc wd...

Ngày tải lên: 14/08/2014, 05:20

... section we introduce several methods for this purpose A major reason for selecting these methods to present here is the availability of computer software that can perform the calculations 12.4.1 ... ) (see Table 13.2 for details) The partial likelihood function for this  reduced data set is the product of these two terms The partial likelihood function for the entire data set in Table 13.1 ... adjusting for age, gender, and current smoking status The SAS procedure PHREG is used with Breslow’s approximation for ties (default procedure) and three variable selection methods (forward, backward,...

Ngày tải lên: 14/08/2014, 05:21

... provided that the data are arranged in a certain format The following example illustrates the terms in (13.4.6) and the data format required by SAS Example 13.7 We use again the data in Table 13.6 ... for all the other variables For example, in Example 14.4, the regression coefficient for the gender variable, 90.279, is an estimate of the log odds ratio for females versus males, adjusting for ... (13.4.10) The format the data have to be in for the available software, such as SAS, SPSS, and BMDP, 372         Table 13.15 Rearranged Data from...

Ngày tải lên: 14/08/2014, 05:21

... higher) for a 1-unit increase in LINSUL from the model for IFG versus NFG SBP is not significant in the model for IFG versus NFG (p : 0.2346) Neither SBP nor LINSUL is significant in the model for ... 9, 11, and 12 to perform additional statistical inferences For instance, we can test whether the coefficients for SBP in the first two models are equal (whether the odds ratio for a 1-unit increase ... linsul smoke / selection : s lackfit link : cloglog; run; SPSS code for the model in (14.2.28) with the forward selection method: data list file : ‘c:!ex14d2d6.dat’ free / age ageg sex sbp dbp lacr...

Ngày tải lên: 14/08/2014, 05:21

... Approach Methods of Information in Medicine, 40(4), 288—292 Lee, E T (1980) Statistical Methods for Survival Data Analysis Lifetime Learning Publications, Belmont, CA Lee, E T (1992) Statistical Methods ... reading for all statisticians, whether in academia, industry, government, or research ABRAHAM and LEDOLTER · Statistical Methods for Forecasting AGRESTI · Analysis of Ordinal Categorical Data AGRESTI ... Analysis of Binary Data, 2nd ed Chapman & Hall, London Crawford, S L., Tennstedt, S L., and McKinlay, J B (1995) A Comparison of Analytic Methods for Non-random Missingness of Outcome Data J Clin Epidemiol,...

Ngày tải lên: 14/08/2014, 05:21

... Statistical Methods for Survival Data Analysis Statistical Methods for Survival Data Analysis Third Edition ELISA T LEE JOHN WENYU WANG Department of Biostatistics and Epidemiology and Center for American ... edition of Statistical Methods for Survival Data Analysis is intended to provide a comprehensive introduction of the most commonly used methods for analyzing survival data It begins with basic ... electronic formats Some content that appears in print, however, may not be available in electronic format Library of Congress Cataloging-in-Publication Data: Lee, Elisa T Statistical methods for survival...

Ngày tải lên: 14/08/2014, 09:22

... known Therefore, we suggest using nonparametric methods to analyze survival data before attempting to fit a theoretical distribution If the main objective is to find a model for the data, estimates ... Nonparametric Methods of Estimating Survival Functions In this chapter we discuss methods of estimating the three survival (survivorship, density, and hazard) functions for censored data Unfortunately, ... interval ( q ) The information is obtained from census data For R V example, ( q ) for age interval 20—21 is the proportion of persons who R V died on or after their 20th birthday and before their 21st...

Ngày tải lên: 14/08/2014, 09:22

... >) is equal to e(t ) for t - t> Thus w for censored G G H H G observations t> equals 9e(t ), where t - t> For example, w for 16> is G G H H G 9e(15), or 90.100, and that for 18> is 9e(18), or ... the data in each row are for the same patient The following SAS code can be used to perform the logrank test data w1; infile ‘c:!d5d1.dat’ missover; input t cens treat; run; proc lifetest data ... (1964) suggests using the scores t , , t as before for the failures and L NL t for all censored observations The mean score, for example, for the N> L first group is r t  ; (n r )t  ...

Ngày tải lên: 14/08/2014, 09:22

... estimation of by maximum likelihood methods for data without censored observations will be given first followed by the case with censored observations Estimation of for Data without Censored Observations ... and  for samples with and without censored observations 7.4.1 Estimation of and for Data without Censored Observations Estimations of and  for complete samples by maximum likelihood methods ... interval for computed from (7.2.33) is 2(600) 2(600) : : 31.526 8.231 or (38.064, 145.790) When data are progressively censored, Gehan (1970) derives an estimate for G and a modified MLE for the...

Ngày tải lên: 14/08/2014, 09:22

... time data observed from rats fed with saturated diets in Table 3.4 We select the lognormal distribution for this —   217 set of data for illustrative purposes Using methods ... * * @A : 9log for the exponential and the extended generalized gamma, :9(1/ ) log for the Weibull, : for the lognormal, and :9(1/ ) log for the log-logistic distribution A B : 1/ for the Weibull ... appropriate for the observed data It is possible that a distribution with different b in the family  may be appropriate 9.2 TESTS FOR APPROPRIATENESS OF A FAMILY OF DISTRIBUTIONS The usual method for...

Ngày tải lên: 14/08/2014, 09:22

... critical if 1% of data for one independent variable is missing than if 40% of data for several independent variables is missing When a substantial proportion of subjects has missing data for a variable, ... surviving a given time  G for rats fed with any of the diets For example, for rats fed a low-fat diet,    273 Table 11.3 Analysis Results for Rat Data in Table 3.4 Using a ... gamma model on lung cancer data set wb; model : ‘Weibull’; data wc; set wc; model : ‘LNnormal’; data wd; set wd; model : ‘Gamma’; data we; set we; model : ‘LLogistic’; data w2; set wa wb wc wd...

Ngày tải lên: 14/08/2014, 09:22

... section we introduce several methods for this purpose A major reason for selecting these methods to present here is the availability of computer software that can perform the calculations 12.4.1 ... ) (see Table 13.2 for details) The partial likelihood function for this  reduced data set is the product of these two terms The partial likelihood function for the entire data set in Table 13.1 ... adjusting for age, gender, and current smoking status The SAS procedure PHREG is used with Breslow’s approximation for ties (default procedure) and three variable selection methods (forward, backward,...

Ngày tải lên: 14/08/2014, 09:22

... provided that the data are arranged in a certain format The following example illustrates the terms in (13.4.6) and the data format required by SAS Example 13.7 We use again the data in Table 13.6 ... for all the other variables For example, in Example 14.4, the regression coefficient for the gender variable, 90.279, is an estimate of the log odds ratio for females versus males, adjusting for ... (13.4.10) The format the data have to be in for the available software, such as SAS, SPSS, and BMDP, 372         Table 13.15 Rearranged Data from...

Ngày tải lên: 14/08/2014, 09:22

... Confidence Interval for Odds Ratio Table 14.18 Asymptotic Partial Likelihood Inference from the Ordinal Regression Model with Different Link Functions for the Diabetic Status Data in Example 14.9 ... covariate, by using the data from DM and NFG participants only; (3) fit a logistic regression for the binary outcome IFG versus NFG, with SEX as the covariate, by using the data from IFG and NFG ... coefficients for SBP and LINSUL, respectively   25.835 37.813 26.025 5.721 19.534 0.0001 0.0001 0.0001 0.0168 0.0001 Model from Complementary Log-Log Link Function Log-likelihood ratio statistic for...

Ngày tải lên: 14/08/2014, 09:22