Cross Validated Questions, Problems & Solutions : TransWikia.com ~ Page 2

How does autoregression work in R?

I don't understand results of ar() function in R. I made up a very simple case, Fibonacci sequence:x <- c(1,1,2,3,5,8,13,21,34,55)ar(x)result is Coefficients: 1...

Asked on 01/05/2022

2 answer

Error propagation in combined linear models

I have a set of observed values ($y_{1Obs}$) and 3 predictive variables (n = 27). I use multiple linear regression to create a linear model: $Z_1=alpha_0 + alpha_1 W_1 +...

Asked on 01/05/2022 by Chochot

1 answer

When calculating the Gini coefficient for the US, how should the portion of the population which has not filed a return be incorporated?

The Gini coefficient $G$ is a commonly used measure of income distribution inequality, taking values from 0 (meaning every individual in the population...

Asked on 01/05/2022

0 answer

Sampling uncertainty of posterior probability distribution

I'm working on a problem with 3 possible outcomes and a bunch of features. I have a regression model that outputs probabilities for each category and I'd like to extend...

Asked on 01/05/2022 by Milan Bosnic

1 answer

Why can't do ridge regression with one predictor?

I'm trying to fit a ridge regression model with a single predictor. However, when I try to do so in three different R packages I get the three following errors:...

Asked on 01/05/2022

1 answer

How to model properly sequential data when the output has to be used as part of the next input? Model off completely when it makes single mistake

I have time series data and am fitting a (LSTM) neural network. The time series data include let's say a brain wave (var1) as well as the previous state...

Asked on 01/05/2022 by iuppiter

1 answer

Determining whether logistic regression with robust variance for repeated measures is appropriate for my data, or which other model type to use

I am doing an analysis to identify independent predictors of a positive drug test result for patients who self-report being on medication in a cohort study (i.e., I am assessing...

Asked on 01/05/2022

0 answer

How to create an ROC model using three classes

I am trying to create a ROC plot based on response variable with three classes. I believe that is possible based on the answer to this question Here. In...

Asked on 01/05/2022 by Kliocontar

0 answer

What is the origin of the name "conjugate prior"?

I know what a conjugate prior is. But I'm confused by the name itself. Why is it called "conjugate"? A complex conjugate $z^ast$ has a reciprocal relationship with ...

Asked on 01/05/2022

2 answer

Linear Mixed Regression Variance Decomposition

I'm pretty new to R and was hoping to get some advice on variance decomposition in mixed linear models. Similar to this question;How to estimate variance components with...

Asked on 01/05/2022 by lstdnce

0 answer

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