# All Questions

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### How to present a large dataset of polynomial multivariable regression in a useful format

I've produced a large dataset of results from 3 variable inputs. eg: x1, x2, x3 -> y y(x1,x2,x3) I've gone over the problem logically and it was clear the problem was non linear. To this end I've ...
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### Logistic regression when some variables are measured just for a subset of samples

I have been asked an interesting modelling question by a clinician. The outcome he is trying to predict whether a particular type of cancer will occur. One of the covariates is an indicator variable ...
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### Proving that Markov Chain Monte Carlo converges

I actually asked the same question in http://math.stackexchange.com/ as well at http://math.stackexchange.com/questions/753105/proving-that-markov-chain-monte-carlo-converges but since the question is ...
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### Cannot do Tukey test in multcomp

After performing series of linear mixed models in lme4 to justify which model with which level of interaction to be used, now I would like to do the Tukey's test for multiple comparison. So first, I ...
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### Confirmative Factor Analysis with R lavaan

i tried to do a cfa with lavaan package in R. I'm not sure, if SO is the right stackexchange plattform, if mathematics fits better just tell me and i will move it. Here is my model: I know how to ...
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### Reading the output from a GLMM run in R

I am a complete novice and dummy when it comes to statistics so I apologise in advance... I have been asked to report the results of my GLMMs (I ran two) in a table. This table must state: effect, ...
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### Retrospective case study and inferential statistics

I am carrying out some research and am a novice to statistics, having done a 2 week module primarily focusing on parametric data and experimental design. However, for my research I am doing a ...
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### Rpart and tree models — cross validation beyond cp value

I normally cross-validate my tree-models (rpart) only on cp-value, e.g. by using caret or xpred or the internal rpart cross validation function. However, there are other rpart parameters -- for ...
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### How to value comparative Likert results

I have absolutely no knowledge of statistics. My question is how to make sense of some evaluation results I received. The attached graph represents my results of a Likert question compared to my ...
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### Help me calculate how many people will come to my wedding! Can I attribute a percentage to each person and add them?

I am planning my wedding. I wish to estimate how many people will come to my wedding. I have created a list of people and the chance that they will attend in percentage. For example ...