Stats Questions & Answers

Questions regarding geodesics in Adler and Taylor's “Random Fields and Geometry”
Questions regarding geodesics in Adler and Taylor's “Random Fields and Geometry” I'm working through...

Ideas on how to model categorial variable with varying combination of values?
Ideas on how to model categorial variable with varying combination of values? I am doing an interesting data mining...

MMSE Decision Rule Problem
MMSE Decision Rule Problem I'm having some difficulty understanding parts of the solution to this problem. I think I...

Multicollinearity and statistical significance issue in regression model
Multicollinearity and statistical significance issue in regression model In a linear regression model, I'm considering...

Use of three way Anova or Ancova in R?
Use of three way Anova or Ancova in R? I doing a three way Anova (or Ancova  I'm not sure, hence my question) in R. I...

When to use training and test data sets
When to use training and test data sets So, I have a data set (Data set 1) with 2000 data points and 70 covariates on...

What is the difference of sequence length and time step in recurrent neural network (RNN)?
What is the difference of sequence length and time step in recurrent neural network (RNN)? I am confused about the...

How do I normalize data in online learning?
How do I normalize data in online learning? In offline machine learning, the data normalization of features with...

How do I combine (merge) two scales?
How do I combine (merge) two scales? I mesured two constructs, intention to book a room (4 items) and intention to book...

Loglinear regression vs. Poission regression
Loglinear regression vs. Poission regression In this post, OP asked the difference between log linear regression and...

Time Independence and Conditional Expectation
Time Independence and Conditional Expectation Suppose we have a random walk process:...

Multivariate central limit theorem for independent nonidentically distributed random vectors
Multivariate central limit theorem for independent nonidentically distributed random vectors Is there a paper or book...

Why can't I just analyse compositional data using regular multivariate analysis?
Why can't I just analyse compositional data using regular multivariate analysis? For a data set, I have...

How to interpret AR and MA coefficients in ARIMA model?
How to interpret AR and MA coefficients in ARIMA model? I have estimated ARIMA model of impact of debt on growth and...

Correlation between unpaired repeated measures
Correlation between unpaired repeated measures This is most likely very basic, but I'm trying to measure correlation...

What kind of SPSS test is this?
What kind of SPSS test is this? I was wondering if anyone could tell me what kind of SPSS test would output something...

2way anova: Calculating the sample size needed
2way anova: Calculating the sample size needed I have two factors, each with 3 levels, and my sample size n = 3. So my...

Uncertainty on a point from systematically biased data (high R squared, high MAPE)
Uncertainty on a point from systematically biased data (high R squared, high MAPE) I have some data that is...

Test of independence with three levels on 6 observations on a 17 Likert rating
Test of independence with three levels on 6 observations on a 17 Likert rating I've data from an in between subject...

Cannot obtain a good regression model with features having significant correlation with the target variable
Cannot obtain a good regression model with features having significant correlation with the target variable I have...

mvtnorm package giving incorrect bivariate student t density?
mvtnorm package giving incorrect bivariate student t density? I am trying to use the Mvtnorm package in R for the...

Probability that half of a sample from a normal distribution will be above a threshold
Probability that half of a sample from a normal distribution will be above a threshold Suppose we have $n$ samples drawn...

Reinforcement learning problem
Reinforcement learning problem I am asked to design an algorithm to find the shortest path in a given map with...

LDA and multiple regression for two groups
LDA and multiple regression for two groups Given that linear discriminant analysis (LDA) for two groups and multiple...

method to compare means including standard errors
method to compare means including standard errors Let's say you want to compare the means of 25 groups and you also want...