# All Questions

2 views

### What tests and plots to use with conditional probability?

I have datapoints collected from Italian students' curricula, including final marks received for one Exam (between 18 and 31) and their Final Degree (cum- or sine-laude). I’m interested in studying ...
8 views

### Different results using Brier score and Logarithmic scoring rule

Let $X_i\sim B(\pi_i), \text{for }i=1,2,\cdots,n$. I have two models and I want to compare which of them forecast better. Model 1: Estimates the parameters with maximum likelihood. Model 2: ...
4 views

### Difference in Difference vs repeated measures

Hi I am trying to understand the difference between Difference in Difference analysis and a repeated measures ANOVA. My DiD data set is made up of 32 treated and 32 non treated subjects each with 2 ...
3 views

### How to round strata size in stratified sampling?

I'll try to illustrate my question with an example of a stratified sampling study. Let's say we have a population of 1000 and we want take a sample of 100, hence a fraction of 10% from each strata. ...
3 views

15 views

### Don't Understand Installation and Use [on hold]

I have just downloaded r and r studio. I scroll to the bottom when I open the R studio but do not see anything about SDS despite the fact that I have tried to download it several times. Please advise! ...
9 views

### Accuracy in neural network for regression

I want to measure the accuracy in neural network that performs regression. I have two outputs. Is the root-mean-square deviation ( RMS wiki) the right way to go? From wikipedia RMSD is a good ...
9 views

### Predict function in r - time series

I have built a model on my training dataset where I have used the difference of the log(Y) i.e. diff(log(Y)) as my response variable. Now if I want to use this for predicting the Y variable in my ...
16 views

### Is Deep Neural Networks suitable for Cancer Detection? [on hold]

I am currently working on a project which main topic is to analyze a patient's medical images in order to know if she is affected by Cervical Cancer or not. One image contains 6000 pixels. For each ...
8 views

### How to plot ROC for knn (and potentially kernel spectral regression)

I understand how to plot ROC for logistic classifier (like varies the probability cutoff). For KNN, how can I find the ROC? Also, what about kernel spectral regression?
5 views

### Deriving the expectation of an OU model

I have an Ornstein-Uhlenbeck model (listed below) and I know what the expectation and variance should be, but I am having difficulty deriving them for myself. Can anybody point me towards a good ...
14 views

### glasso- Assumptions of Meinhausen-Buhlmann approximation?

First off, This is not an R question - it is a conceptual question, so there is no need to perform any code. Problem: I'm trying to invert a large dimensional covariance matrix of p features. For ...
16 views

### Selecting Subset of Quantitative Variables in R [on hold]

Is there a way to generate a subset of my quantitative variables in R, without having to manually select them in the subset() command? I have very many quantitative variables, and it would be too time ...
17 views

### Generating parameters from lognormal or Gamma likelihood

I need to draw the gamma or lognormal parameters only from their likelihood functions. I'm using uniform prior, so the posterior distribution coincides with the likelihood functions. Is there a ...
25 views

### Different coefficient values from multiple versus bivariate regression

I wonder how to generate such data, so that in single variable regression feature coefficient would be positive, and in multiple regression would be negative. So I read several related questions on ...
5 views

### Partial Correlation - Quantifying the effect of removing confounding variables on the correlation

I'm conducting partial correlation in order to quantify the association between two variables, X and Y, after the effect of a set of confounding variables Z has been removed from both X and Y. In ...
9 views

### How to properly calculate average need-based aid met by an institution?

As an institution we give out a certain amount of financial aid every year (need-based aid) to each student. This need-based aid does not always meet the students estimated need. My task is to compare ...
11 views

### Has order of an attributes impact on neural network learnig?

I want to ask if order of attributes can impact on neural network learning. Is it the same if the input vector looks like this: a b c d e and like this: ...