Answer Recent Asked Questions on TransWikia.com ~ Page 237

Should I use a seasonal arima or stl decomposition and model residuals only?

I have a basic question in time series modeling. (using r but the question is not particularly about r) For a time series with obvious seasonality, shall I use ...

Cross Validated Asked by string_is_hard on 2 years ago

Endogenous controls in linear regression - Alternative approach?

I have a cross-section of $x$, $y_1$, and $y_2$. These are individual level data used in labor economics. I have random variation in $x$ and I'm...

Cross Validated Asked by sgtbp on 2 years ago

Variable selection in logistic regression model

I'm working on a logistic regression model, I have 417 independent variables to try, but running a model with all of them is too much (for Rstudio), what would be...

Cross Validated Asked on 2 years ago

EM Algorithm Derivation, Discrete Case

Just wanted to ask whether the following derivation is correct: Suppose $X$ is a vector of observed random variables, $Z$ is a vector of unobserved random variables and...

Cross Validated Asked on 2 years ago

Should we really do Re-Sampling in Class Imbalance data?

I have been doing ML for quite some time and I have a thought in class imbalance problems that has bothered me quite a lot. In problems where we have...

Cross Validated Asked by Baktaawar on 2 years ago

How to determine data size is statistically efficient?

I have a question about the data size for probability of default model.For each consumer, I have a binary bit to indicate whether the client goes default or not...

Cross Validated Asked by 1111ktq on 2 years ago

(Non-limit) distribution of maxima from different univariate, discrete and stationary time series

Motivation: I'm currently studying the convergence of maxima from simulated time series to max-stable distributions, and in order to do so, I want to better understand the penultimate distribution of...

Cross Validated Asked on 2 years ago

Confused about stationarity and ARIMA processes

So I am quite confused about stationarity in ARIMA processes. For example, a Random Walk is an ARIMA process with order (1,0,0). Does this mean that a Random walk is...

Cross Validated Asked on 2 years ago

How to remove correlated features?

I have a small dataset (200 samples and 22 features) and I am trying to solve a binary classification problem. All my features are continuous and lie on a scale...

Cross Validated Asked by iCHAIT on 2 years ago

Between- and within-person level effects when using multilevel modelling for longitudinal data in R

I’m using nlme package in R for analysing longitudinal data. The aim is to understand if changes in need satisfaction (TNS) and need frustration (TNF) predict changes in well-being (WBtot)...

Cross Validated Asked by AF1402 on 2 years ago

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