# Questions tagged [pooling]

Pooling, eg for variance, is used when several groups or populations are assumed to have a common property (a common parameter value) and the information from all the groups or populations are used together to estimate that common property.

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### Bootstrap standard errors after multiple imputation

Following Rubin's rules for multiple imputation, I've calculated pooled estimates, group means in this case, with pooled standard errors. I checked this with a bootstrap and, assuming pooled standard ...
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### Estimating variance from several samples

If several samples are taken from a distribution, say Gaussian, each sample having size n1,n2,n3,... and the SD of the underlying distribution is estimated from each of the samples, how can those ...
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### pooled time-series regression

Suppose I am running country-level time-series regressions of stock market returns $r_{i,t}$ on some global predictor $p_{t-1}$ , where $i$ and $t$ denote a country and a month, respectively: \begin{...
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### Standard error of mean with varying replicates for batches

I have three batches of simulations and I calculate a specific property from these (not important for the question). I want to calculate combined SEM for these three batches Batch | #samples | ...
1 vote
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### How can I combine/pool the results of regression ANN? [closed]

In my analysis, the data contains 5 imputed dependent variables. So, after analyzing all of the dependent variables separately with a regression neural network, I need to combine/pool the results. ...
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### In multilevel logistic regression, can pooled data return significant variables when the same variables in stratified data are not significant?

I have analyzed some secondary data that relates to Plasmodium infection at three forest sites: inside the forest, at the forest fringe, and outside the forest. The outcome variable is infection with ...
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### Proportion testing from pooled single cell/nucleus samples

I have a snRNAseq experiment with a 2x2 layout (wt vs transgenic, drug vs vehicle; Wt-V, Wt-D, Tg-V, Tg-D). I have 6 mice per group, but for cost reasons we pooled pairs of samples in each group, for ...
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### Pooling survey years in random forests

I am currently trying to predict household wealth in a random forest, using survey data. My problem is the number of the observations. I have the option to either choose single years (n=4.000) or ...
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### Is there a best approach for statistical power for field experiment?

I'm setting up a field experiment and want to make a solid plan for the analysis, since that's whereI get stressed in the process. I will deploy 26 pairs of traps. 13 pairs will be in urban forest, ...
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1 vote
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### Combining data before and after protocol modification

In one of my research, we decided to "update" the procedure mid-study. In short, we initially tested a repeated measures design (1 factor with 3 levels, 5 times per condition for a total of ...
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### Global Average Pooling layer and location information

I've got a question about the usage of Global Average Pooling layer (GAP). I am working on the classification of sea level pressure data, where obviously the location of high/low pressure system ...
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### Panel vs Pooled OLS

My sample comprises of data on accounting performance of companies that had their IPOs between 2009-22. I want to examine if companies which had more foreign investor participation in their IPOs ...
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### Is it necessary to use attention mask for mean pooling for BERT?

I am working on a project involving the analysis of clinical texts using the "emilyalsentzer/Bio_ClinicalBERT" model from Hugging Face's transformers library. My goal is to extract ...
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### Why does Partial Pooling occur in Mixed Effects Regressions?

I am trying to create an intuitive example which shows why Mixed Effects Regression models perform Partial Pooling in the background. I previously tried to demonstrate that Mixed Effects Regressions ...
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### Pooling uncorrelated data to increase size of data or not

I have a generic ML "theory" question, and I haven't been able to find any papers with online search. Background My area is financial price prediction, and this is an area where ML generally ...
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### Panel Data Estimation and Control Variables

My undergrad thesis has something to do with the relationship between emissions, mitigation-related official development assistance, and governance variables in chosen ASEAN countries. As such, my (...
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### How to pool hazard ratios from multi-arm study to get a unique HR between two arms?

Good morning I should start a meta-analysis but I am facing with a problem of extracting/combining data from one study. I am comparing A versus B population in terms of overall survival. The study ...
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### Pooled Kurtosis Estimator Using Pooled Cumulant Estimators

I am trying to come up with a statistically sensible pooled kurtosis estimator that is based on pooled cumulant estimators. Specifically, I have unbiased estimators of the second and fourth cumulant ...
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### Pooled Standard deviation of means

I am reading the book Statistical Methods In Online A/B Testing. I have two questions: 1. Please Consider the scenario, an A/B test in which the variance of A and B groups are assumed to be same, and ...
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### Pooled analysis of different but very similar measures; what is the best practice?

I have three small data sets which include scores on global cognitive assessments. Two data sets use the score on the Mini Mental State Exam, one uses the score of the Montreal Cognitive Assessment. ...
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### No Pooling approach is being applied from a fixed effect

Hello I was reading about no pooling and partial pooling. I understoond that a mixed model is using partial pooling approach when we talking about hierarchical data. Is it correct to say that fixed ...
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### How to impute the std deviation of a sample using the pooled mean and standard deviation of similar samples?

I want to perform a meta-regression based on the mean changes from baseline values.In one of the studies, the standard deviation has not been mentioned. How can I impute the value of the missed ...
1 vote
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