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Cross Validated : Recent Questions and Answers (Page 29)

Find answers to your questions about Cross Validated or help others by answering their Cross Validated questions.

Generating values from Normal Mixture distributions via copulas

I have some values with unknown joint distribution, but I am assuming that the marginal distributions are two-part Normal Mixtures.I am modelling the dependency between the distributions via vine-copulas...

Asked on 11/26/2021 by Ravonrip

1 answer

Split-plot analysis with four factors in SAS

I'm trying to correctly model a split-plot design with more than two factors (specifically, four) in SAS. I'm interested in an example from Design and Analysis of Experiments (Montgomery ,...

Asked on 11/26/2021

1 answer

How to learn 'end of sequence' for continuous sequence?

Consider Autoregressive model (i.e. RNN Language model) which try to output next token given all previous tokens. When generating sequence with this model, model need to learn when should be...

Asked on 11/26/2021 by Ken Geonmin Kim

1 answer

Parameter Tuning for Random Forest Text Classifier

I train a binary random forest classifier on skikit-learn's 20 newsgroups dataset. I want to tune the parameters and try so by gridsearch and 3-fold crossvalidation on the training data....

Asked on 11/26/2021

2 answer

Understanding distributional Temporal Difference Learning

I am trying to understand a recently published Deepmind Paper. In the supplementary information of the paper (accessible here), the authors explain distributional temporal...

Asked on 11/26/2021

1 answer

Intuition behind Box-Cox transform

For features that are heavily skewed, the Transformation technique is useful to stabilize variance, make the data more normal distribution-like, improve the validity of measures of association. I am really...

Asked on 11/26/2021

2 answer

Why is logistic regression particularly prone to overfitting in high dimensions?

Why does "the asymptotic nature of logistic regression" make it particularly prone to overfitting in high dimensions? (source): ...

Asked on 11/26/2021

8 answer

Covariance matrix of integral of multivariate normal distribution

If $t = [t_0, t_1, dots, t_{N-1}] in mathbb{R}^N$ with $t_i sim N(mu_i, sigma_i^2)$ and its covariance matrix $C in mathbb{R}^{N times N}$ where $C_{ij} =...

Asked on 11/26/2021 by Crash Overflow

0 answer

Generate bounded numbers with approximately skewed normal distribution

Possible duplicate I'm trying to generate n numbers, each of which lies between [1,m] (where m is an integer), such that their frequency roughly follows a skewed normal distribution....

Asked on 11/26/2021 by wrahool

0 answer

How would you test for a difference in mean group differences between scenarios?

Suppose I'm looking at gender differences across two scenarios (all respondents answered both scenarios) and I want to know whether the gap between men and women varies between scenarios. Suppose...

Asked on 11/26/2021

2 answer

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