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Cross Validated : Recent Questions and Answers (Page 54)

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

Minimum sample size per cluster in a random effect model

Is there a rational for the number of observations per cluster in a random effect model? I have a sample size of 1,500 with 700 clusters modeled as exchangeable random...

Asked on 02/20/2021 by Roccer

2 answer

Outlier detection for a univariate categorical variable?

Does anyone know an outlier detection method for a univariate categorical (nominal, unordered) statistical variable? Without any assumptions about the categorical variable distribution (non-parametric method)?...

Asked on 02/20/2021 by Abdu

3 answer

COVID-19: Individual level, cross-country Panel dataset. Which method to use?

I am struggling with the most appropriate method to use for my Master thesis on the impact on mental health indicators of informal caregivers before and after the start of...

Asked on 02/20/2021 by user307627

0 answer

Partial dependence plot, GBM multinomial

I'm using gbm package to create a gradient boosting model with multinomial family. I have problems in plotting and interpreting partial dependence plots with this type of models. an example:...

Asked on 02/19/2021 by Daniel L

1 answer

Why is it ok to remove variables with low variance from a dataset

It is a common practice in data analysis to remove features (independent variables) with low variance for dimensionality reduction, with the justification that a feature with low variance cannot explain...

Asked on 02/19/2021 by Amnon

0 answer

In a predefined (but realistic, and explaining) example, what $p(x)$ should be in a variational autoencoder?

I'm learning about variational autoencoders for a month now. The more I'm reading, and digging deep about it, the more confused I am. Thinking about it an a neural network...

Asked on 02/19/2021 by Gergő Horváth

1 answer

Examples of Bayesian and frequentist approach giving different answers

Note: I am aware of philosophical differences between Bayesian and frequentist statistics.For example "what is the probability that the coin on the table is heads" doesn't make sense in...

Asked on 02/19/2021

7 answer

Choice of covariate under Independent Hypothesis Weighting (IHW)

After reading this survey of methods for controlling FDR and considering my problem at hand (https://genomebiology.biomedcentral.com/articles/10.1186/s13059-019-1716-1), IHW seems like a good choice. In order for IHW to...

Asked on 02/19/2021 by Kyle Pena

0 answer

What is the advantages of Wasserstein metric compared to Kullback-Leibler divergence?

What is the practical difference between Wasserstein metric and Kullback-Leibler divergence? Wasserstein metric is also referred to as Earth mover's distance. From Wikipedia:Wasserstein (or Vaserstein) metric...

Asked on 02/19/2021 by Thomas Fauskanger

5 answer

Regression Analysis with a Census or All Observations (Not a Sample)?

I have data that I've collected from every element in my population of study (a census), and not a sample. I am hoping to use the data to develop...

Asked on 02/18/2021 by StatCurious

1 answer

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