Marcello Franchini

9 Questions 14 Answers 0 Followers

Questions related from Marcello Franchini

Significant scaled covariates in cumulative link models?

As for cumulative link models (also called ordinal logistic regression models), Christensen (2016) reports that, in the case the proportional odds assumption is not met, one or more covariates...

03 August 2022 3,102 4 View

Hotspot analysis using ArcGIS?

I implemented the hotspot analysis using ArcGIS which relies on the Getis-Ord Gi* statistics. Based on the information reported on the corresponding ESRI webpage, even if data are clustered the...

20 June 2022 6,678 4 View

Why are genes leading to a white coat in South African lions not negatively selected?

Some South African lions present unique phenotypic traits, including a white coat and light blue eyes. To the best of my knowledge, the only populations presenting such characteristics are located...

19 September 2021 1,782 4 View

Test to assess the adequacy of a sample size for statistical analysis?

I would like to know if there is an existing statistical test, like for instance the Kaiser-Meyer-Olkin test for sampling adequacy used for the PCA, to test if a sample size is numerically big...

21 November 2020 3,353 5 View

Habitat Framentation Index calculation?

Dear all, Good evening. What is the correct procedure to calculate a Habitat Fragmentation Index using QGIS or FRAGSTAT Software starting from a vector layer? I suppose that, first, I must...

14 June 2020 1,567 0 View

P-value estimation in correlation test?

Good afternoon, I have a trouble with the output obtained from a correlation test performed, using Spearman's correlation coefficient, with R Software. The output obtained is the...

11 June 2019 9,969 3 View

Funds for PhD?

Good morning, My name is Marcello Franchini and I'm a Research Fellow at the University of Udine (Italy). I obtained the possibility to perform a PhD abroad but, in order to perform it, I need to...

09 April 2019 5,047 3 View

What is the difference among GLMM and GAMM?

What is the difference among Generalized Linear Mixed Models and Generalized Additive Mixed Models? Are GAMM non-linear regression models? Many thanks to whom will reply.

11 September 2018 5,017 3 View

GLM models can be used also to assess the relation among a variables, using average values (previously calculated) of each variable itself?

Good afternoon, I would like to know if GLM models can be used also to assess the relation among a dependent and independent variables, using average values (previously calculated and included in...

04 August 2018 8,170 3 View