Results 171 to 180 of about 1,170 (203)
Injury patterns and cumulative injury burden among U.S. competitive fencers: A survey. [PDF]
PLoS OneHolmes K +5 more
europepmc +1 more source
Shifting Heights? A 40-Year Resurvey of Alpine Marmot Distribution in Response to Climate Change. [PDF]
Ecol EvolSimma M +6 more
europepmc +1 more source
Underdispersion and overdispersion of traits in terrestrial snail communities on islands [PDF]
Ecology and Evolution, 2014 AbstractUnderstanding and disentangling different processes underlying the assembly and diversity of communities remains a key challenge in ecology. Species can assemble into communities either randomly or due to deterministic processes. Deterministic assembly leads to species being more similar (underdispersed) or more different (overdispersed) in ...
Tina Astor +2 more
exaly +7 more sources
No effect of model distribution on long-term trends, even with underdispersion
Ecological Informatics, 2023 While many studies have illustrated the decline of animal populations—particularly of farmland birds—the statistical analyses, design, and protocols used have raised some concerns and criticism. Using a 27-year dataset (1996–2022) based on recording the number of skylarks (Alauda arvensis) at 160 longitudinal count points, our study confronts two ...
Sabrina Gaba, Vincent Bretagnolle
exaly +5 more sources
Underdispersion models: Models that are “under the radar”
Communications in Statistics - Theory and Methods, 2017 The Poisson distribution is a benchmark for modeling count data. Its equidispersion constraint, however, does not accurately represent real data.
Kimberly F Sellers
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AStA Advances in Statistical Analysis, 2022 Count data as response variables are commonly modeled using Poisson regression models, which require equidispersion, i.e., equal mean and variance. However, this relationship does not always occur, and the variance may be higher or lower than the mean ...
Douglas Toledo +2 more
exaly +2 more sources
Journal of Transportation Safety and Security, 2011 Poisson basic assumption of equidispersion is often too much restrictive for crash count data; in fact this type of data has been found to often exhibit overdispersion.
Anna Grana, Ferdinando Corriere
exaly +2 more sources
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Weighted Poisson Distributions for Overdispersion and Underdispersion Situations
Annals of the Institute of Statistical Mathematics, 1998zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Joan Del Castillo, Marta Pérez-Casany
exaly +3 more sources