Modelling Count Data in Psychological Research: An Applied Tutorial Across subfields of psychology, researchers frequently encounter count variables (i.e., non-negative integer values, which result from counted measurements). Although count variables are common in ps....

#statstab #430 Modelling Count Data in Psychological Research: An Applied Tutorial

Thoughts: A fairly comprehensive frequentist tutorial. Covers some edge cases, but doesn't explain them well.

#count #poisson #negativebinomial #IRR #tutorial #education

doi.org/10.1002/ijop...

When to use negative binomial and Poisson regression When would one use a negative binomial regression and when would one use Poisson regression with respect to the mean and variance?

#statstab #266 When to use negative binomial and Poisson regression

Thoughts: A heated debate and condemnation of NB by @noah_greifer. Seems term confusion is also an issue in the field.

#poisson #regression #negativebinomial #countdata #overdispersion

stats.stackexchange.com/questions/65...

Probability of selling all 5 matchboxes vs. houses visited so far. Plot of cumulative distribution function of r>=5 successes after kth trial with p=0.4, with k<=30. Crosses 50% around 12th house and 90% around 18th house.

A barefoot girl warms herself on a snow-covered street. Illustration by Paul Hey

A #probability story problem: "The Little Match Girl"

Pat sells boxes of matches door to door, with a probability p = 0.4 of selling a box at each house. What's the chance she will exhaust all 30 houses in the village before selling the 5th box?

#NegativeBinomial #HCAndersen