Questions tagged [beta-distribution]
A two-parameter family of univariate distributions defined on the interval $[0,1]$.
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Coefficients in models [duplicate]
I have a situation where the beta of one of my variables (which is categorical) is greater than 1. I am not sure why, but my instinct is because the variable I am looking at is categorical.
Can anyone ...
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What prior distribution could I use for estimating a proportion, if I know some proportions are impossible?
I'm currently learning on my own about Bayesian methods, and I asked myself the following hypothetical question.
Let's say I collected data to estimate a proportion, e.g. the proportion of women in a ...
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Ranking and Comparing Beta Distributions
I'll try to explain my problem:
What I have:
I built a Thompson sampler which given a data set it classifies data with a key and determines if it is considered a success or not, thus having for each ...
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Repeatability (ICC) for negative binomial and beta models
I am estimating repeatability (a type of intra-class correlation) from mixed models with negative binomial and beta distributions and want to confirm that the variance transformations to obtain ...
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Dependence structure of inner products of vectors on unit sphere
This relates to the question here Distribution of scalar products of two random unit vectors in $D$ dimensions but I don't have enough reputation to ask this as a comment... anyway. The reply to the ...
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Forecasting beta distributions
I hope you are doing well. I would appreciate your help with the following questions (listed at the end).
Context
There is a financial aid program that covers tuition fees for university students for ...
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R-squared for glmmTMB with beta distribution and variance-covariance matrix as random effect
I'm performing a multi-species analysis on in which each data point relates to a species (n = 19). My response variable is a proportion and so I'm using a beta distribution with logit link. I've ...
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Mean distribution given sample for the normal distribution [duplicate]
The Beta distribution comes when we try to estimate the probability parameter of the binomial distribution given a sample, it uses the Bayes theorem to derive the distribution of probabilities of ...
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Discrepancy in point estimate and standard error of random effect variance component between Bayesian and frequentist GLMMs
I am investigating the properties of a GLMM with Beta response distribution and a hurdle component to model the probability of observing a zero. I have fit a frequentist version of the model using the ...
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Modelling approach for proportion/rate data
I need to model the effect of several numeric predictor variables and one binary categorical on vegetation lost over a specific time period. I have original and lost area per observation as a ...
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Advice needed: Modelling measured proportion data that goes beyond 100% [closed]
I've been tasked to analyse a data set from an oceanographic expedition collecting water profiles using a ctd. One of the variables collected is the oxygen saturation in percentages saturation. I'm ...
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Beta Binomial distribution conditional on realized gamma value
I am looking to derive the formula for the conditional probability distribution of a beta-binomial random variable $W$ conditional on value of a gamma random variable that drives the beta. The ...
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Distribution of terms in a random walk on the simplex
It is known that the random walk on the simplex $\Delta^{n}$ given by:
$$
X_{t+1} =(1-b_{t}) X_{t} + b_{t} E_{t}
$$
where $X_{0}$ is any point in the simplex, $b_{t}\sim Beta(1, \gamma)$ are sampled ...
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Interpretation of Residual vs Predicted in beta GLMM (glmmTMB) with Dharma
Hi,
I have run a beta GLMMTMB in which my response variable ranges between 0-1 so I have used beta distribution. In my model I've got 3 continuous (numeric) predictors and 3 random effects factors, ...
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Modelling the mean-variance relationship of a beta distribution
I am trying to simulate a DNA methylation dataset. Specifically, I am trying to simulate this dataset, and create artificial perturbations aka differential methylation in a set of genes. I have a ...
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