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Cross Validated : Recent Questions and Answers (Page 19)

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

How much additional information should be provided if approximating a distribution? (KL Divergence)

"If we use a distribution that is different from the true one, then we mustnecessarily have a less efficient coding, and on average the additional informationthat must be...

Asked on 12/13/2021 by delta-divine

1 answer

Linear Discriminant Analysis' predictions newbie question

When I use predict.lda in R (MASS package) which discriminant function does the software choose? Say, I have 4 classes and 3 discriminant functions, does the software always use the...

Asked on 12/13/2021 by sendilab

1 answer

Prediction model of test scores based on subjective assessment

I am trying to build a model where I want to measure the accuracy with which supervisors can predict the outcome of test taker's scores. For example, supervisors rate test...

Asked on 12/13/2021 by Romsch

1 answer

Circular variance of a mixture of Von Mises distributions

Does anyone know if there is an analytical solution for the (circular) variance of a mixture of Von Mises distributions that all have equal (circular) mean? Simulation results suggest that...

Asked on 12/13/2021 by Ronald van den Berg

0 answer

Silhouette Score not robust when clustering time series with tslearn

I have 40 univariate Time series which I am clustering with tslearn. To determine a reasonable amount of clusters, I use the silhouette coefficient. However, I noticed that it is...

Asked on 12/13/2021 by bk_

0 answer

Overview of the main methods to prune decision trees

Could someone explain the main pruning techniques for decision trees. So something like the 3 most common techniques with a short explanation of how they work. I have looked online...

Asked on 12/13/2021

1 answer

Order and interpretation of Gaussian Mixture Model with strong overlap between components

Most examples for Gaussian Mixture Models (GMMs) employ datasets with fairly obvious underlying structure (well-separated clusters). How should one determine the order of a GMM (and interpret the result) when...

Asked on 12/13/2021 by antifrax

1 answer

Statistical data vs Precise data

I have a dataset in which I assign descriptive-statistical data of the geographical zone to each person of the dataset (obviously, the person belongs to that specific zone). For example,...

Asked on 12/11/2021

0 answer

Difference-in-difference in panel data

Under which conditions should we expect the difference-in-difference estimate to be equal to the equivalent panel data model? Strictly speaking, whenever we have a experiment that offers a well...

Asked on 12/11/2021 by user30474

1 answer

Can you please explain Simpson's paradox with equations, instead of contingency tables?

I probably don't have a clear understanding of the Simpson's paradox. Informally I know that the average of response Y1, grouped over all possible levels of factor...

Asked on 12/11/2021

2 answer

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