Questions tagged [nested-data]
Refers to nested experimental design, nested random effects in mixed models, nested factors in ANOVA.
389 questions
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Propensity Score Weights for nested observations
I'm studying whether a private tutor increase kids learning outcomes.
I have a database of kids: each row is a kid. Some of them had the private tutor, some of them didn't.
I matched the kids on the ...
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How to correctly specify random categorical factors in general linear mixed model with spatially correlated factors in R
I have been banging my head on the wall for the last weeks over the following problem:
I want to test the null hypothesis that scallop weight after 90 days does not differ when the scallops are co-...
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Sampling observations from nested groups before ECDF and KS testing
I am creating and comparing ECDFs of percent cover value (0-100%) for three groups of biological observations.
The dataset as a whole is large, with over a million observations. The three groups have ...
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How can you visually display comparisons both within and between groups for a nested experimental design?
I have three different treatment groups (A, B, and C). Each treatment group is split into two subgroups (X, Y). I modeled my data and performed the following pairwise comparisons on my estimated ...
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How to set up a nested linear model with country/region in R
I have variables country and region with the following structure:
country 1
region 1
region 2
country 2
region 3
region 4
region 5
When I create a model with variables ...
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Methods for dimension reduction and modelling of sparse, corelated, hierarchical health data with an outcome
I’m working with a health dataset where the outcome is binary (presence or absence of cardiovascular disease) and fairly rare (~300 people, ~5% of the sample). I have a large number of potential ...
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Why do I need a nested rather than two separate random effect(s) when accounting for pseudoreplication in the presence of repeated measurements?
I have a dataset from individuals, where measurements of different urinary biomarkers have been taken on two study visits:
Subject ID
Value
Visit
Biomarker
Predictors 1-10
1
1.2
1
A
1
1.4
2
A
1
1.5
1
...
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2 factor anova: randomized blocks
Last week I had a statistics training for so called "Six Sigma Black Belts". The trainier mainly taught us were to click in a program, so I was left alone with my question in the following ...
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Predicting with a linear mixed-effects model and nested factor
Following a popular example, consider a linear
mixed-effects model for the score of students in different classes
from different schools. The Class factor is nested ...
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Random effect becomes singular after including nested random effect
I'm confused about what I should do about the results of my logistic regression exploring the effect of maternal age on the incidence of disease in offspring.
I have a large dataset with ...
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Ordering of nested random effects in lmer
I have read in a number of different sources that specifying a nested random effect in lmer() can be done by either '(1|A) + (1|A:B)' OR '(1|A/B)', where B is nested in A. Confusingly however, when I ...
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How do I correctly formulate the random effects with repeated measures in a paired design
Sorry if this is a cross-posting, but I haven't found the exact solution for my problem yet.
Let us assume I have an experiment with 20 households, with 2 people each (1 female + 1 male).
Over the ...
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Mixed effects modeling without repeated measures but with nested subjects
I have a dataset with three subjects per 'trial' with each of the three subjects experiencing one of three conditions (A,B,C). I then run 30 trials (1-30)total using 90 subjects. i.e. 1a/1b/1c; 2a/2b/...
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What design is this: repeated, nested, other?
I've got a bit of a weird data set that at first glance, looks just like repeated measures. I'm hoping figure out if this is a special class of a more common type of model (e.g. repeated measures, ...
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Appropriate Linear Mixed Model for nested data
I'm asking for help with the structure of a linear mixed model I'm trying to run. Here is the description of my study:
I am studying the effect of different stand types (Oak pure, Pine pure and Mixed) ...
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