Why is Poisson regression used for count data?
Poisson distributed data is intrinsically integer-valued, which makes sense for count data. Ordinary Least Squares (OLS, which you call "linear regression") assumes that true values are normally distributed …
Relationship between poisson and exponential distribution
The waiting times for poisson distribution is an exponential distribution with parameter lambda. But I don't understand it. Poisson models the number of arrivals per unit of time for example. How i...
r - Rule of thumb for deciding between Poisson and negative binomal ...
Nov 6, 2023 · The Poisson model may estimate P too low, but I assume there's quite a few orders of magnitude to go before the interpretation changes (without considering any multiplicity or other …
Finding the probability of time between two events for a poisson process
May 25, 2015 · If two events occur at a rate of 1.8 per hour on average, and this occurrence follows a poisson process, what is the probability that there is at least 1 hour between two events? My …
Is a Poisson minus a constant still a Poisson? - Cross Validated
Jun 11, 2024 · You need to explain a bit more what is going on. Currently this question creates three different answers: 1 interpreting your question as being about a truncated/sensored observation 2 …
Estimating $\\lambda$ in a Poisson Distribution from a set of data
Mar 18, 2023 · Since the mean of the Poisson distribution is λ λ, you can use this to estimate λ λ. The "theoretical" values in the table are then obtained using the formula for the Poisson distribution, P(X …
How does Poisson thinning work? - Mathematics Stack Exchange
Oct 19, 2024 · The Poisson process on R R is called non-homogenous with rate λ(t) λ (t) if its intensity measure has density λ(t) λ (t) (total mass of which might not equal 1, but otherwise it is a density). …
Interarrival Times for a Non-Homogeneous Poisson Process
May 26, 2024 · It is well known that the interarrival times for a standard (i.e. homogeneous) Poisson Process follow an Exponential Distribution (What is the correct inter-arrival time distribution in a …
Solution for Overdispersion in Poisson Regression
Oct 14, 2023 · I have run poisson regression in SPSS (Generalized Linear Model), where BMI is my IV and length of stay (LOS) in hospital for certain disease is my DV (and it's a count variable). When I …
Newest 'poisson-process' Questions - Mathematics Stack Exchange
Nov 6, 2025 · Questions relating to the Poisson point process, a description of points uniformly and independently distributed at random over some space such as the real line. The number of points …