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Questions related from Massimiliano Grassi
I have data regarding an experiment. The dependent variable is a count variable ranged 0-5 (n of consecutive days out of 5 in which a subjects experienced a certain condition). I also have two...
31 March 2017 9,887 8 View
I’ve found a lot of different procedures to calculate the AUC confidence interval of a cross-validated model. it may sound quite theoretical but it is not clear to me which parameter these CI...
07 February 2017 4,401 6 View
I have to calculate the CI of the AUC (Roc) for a series of classifiers (e.g. Lasso, Random Forest, SVM) learned using the same test dataset, in order to identify the best model for this problem...
21 December 2016 6,316 3 View
Hi everyone and thank you in advance for you answers. I'm conducting a metaregression and it turned out that some outcomes shows no heterogeneity among effect-sizes (random-model, DerSimonian and...
10 May 2016 4,258 6 View
Hi and thank you to everybody. I have data regarding a training that aimed to improve the agreement among raters. Raters gave a dichotomous judgment (presence/absence).The study is multi-centric:...
30 June 2015 5,892 3 View
Hi everyone, I'm running a regression model (multiple predictors) with bootstrap resampling. I asked for Bias-Corrected and Accelerated confidence interval (as usually preferred to a percentile...
25 May 2015 2,992 3 View
I have to compare the mean levels of a continuos variable y (ranging 1-20) subdividing my sample in two groups according to a dichotomous variables (i.e gender). Sample sizes of the two groups are...
09 April 2015 9,464 4 View
The following is a recurrent issue in our study and by now no consensus have been reached in my team. We made our subjects to perform some neuropsychological tests. An italian validation sample...
19 September 2014 4,891 3 View
I have to compare two ICC calculated by the same three judges on the same sample of subjects (presence/absence of a certain physical dysfunction) after and before a training to improve the judges'...
13 February 2014 3,712 6 View