# Questions tagged [inverse-gaussian-distrib]

A right skew continuous probability distribution on positive real numbers.

29 questions
Filter by
Sorted by
Tagged with
22 views

### Which data visualization when running GLMM?

I'm analysing correct response rate and response time of participants on a task. For the first one, I ran a mixed effect logistic regression: ...
38 views

### How to choose a prior : family for a response with negative values?

I’m modeling percentage change in oxygen levels in the blood from a particular experiment. So my prior before seeing the data was an inverse gaussian distribution. But my data (response variable ) has ...
27 views

### P-values and confidence intervals for Inverse Gaussian GLMM?

I want to test the effects of different variables on Reaction Times data. Following the recommendations of Lo & Andrews (2015) I compared the AIC/BIC of three GLMM with a Gaussian, a Gamma and an ...
57 views

1k views

### Fitting GLM (family = inverse.gaussian) on simulated AR(1)-data

I am encountering quite an annoying and to me incomprehensible problem, and I hope some of you can help me. I am trying to estimate the autoregression (influence of previous measurements of variable X ...
1k views

### Exponential Family with Dispersion Parameter Distributions

Defining the exponential dispersion family by $exp\left(\frac{x_{i}\theta - b(\theta_{i})}{\phi} + c(x_{i}, \phi, w_{i})\right)$ I'd like to change the usual Inverse-Gaussian density below to the ...
144 views

### Deriving Inverse Gaussian as First Passage Time of Wiener Process

Chhikara and Folks (1988) show that the inverse gaussian distribution arises as the first passage time for a wiener process. However, there are several steps I don't quite understand. In particular, ...
2k views

### Python: Gaussian Copula or inverse of cdf

Let's say I have a column x with uniform distributed values. To these values, I applied a cdf-function. Now I want to calculate the Gaussian Copula, but I can't find the function in python. I read ...
472 views

### GLMM inverse gaussian and treatment contrasts (response times)

I've been trying to analyse a dataset of response times following Lo & Andrews' (2015) proposal here: https://doi.org/10.3389/fpsyg.2015.01171 They propose using a GLMM that assumes a Gamma or ...
764 views

### Which Single Summary Statistic to use for Inverted Bell Curve (Bimodal Distribution)?

I've collected some datasets for which I want to report a summary statistic. I produced normal probability plots for the datasets, and the data does not conform to a Gaussian distribution - there are ...
37 views

### Gaussian Bivariate Copulas Inconsistent Reasoning

While studying Gaussian copulas, I have stumbled accross a question which seems to result from wrong reasoning. In the arguments below, where have I gone wrong? Let $c(u, v)$ denote the density of ...
72 views

345 views

### Interpretation of Generalized Inverse Gaussian regression with GAMLSS

Background on my project: I am comparing proteins (nodes) between a network representing protein interactions in metastatic patients v/s another network representing protein interactions in non-...
374 views

233 views

### Specifying distribution in generalized estimating equation GEE

GEE allows you to identify the distribution of the outcome variable and appropriate link function. How do you make this selection in a longitudinal model where the distribution changes in time. An ...
234 views

### Testing GLMM residuals against specific families and link functions (R)

When running a GLMM in R with family=gaussian and link=identity, it's easy enough to test whether normality and homoscedasticity ...
I am considering the Inverse Gaussian distribution as the hitting time distribution for a Wiener process, $W(t)$, with drift parameter $\nu$ and variance parameter $\sigma$. Define the hitting time as ...