Useful tips for everyday
Does Kruskal Wallis test use ranks? The Kruskal Wallis H test uses ranks instead of actual data. The Kruskal Wallis test is the non parametric…
What is collective analysis? Collective analyses offer all participants a voice, visualize their contributions, combine different actors’ perspectives, and anchor the result of the interpretation…
What is a pivotal quantity in statistics? In statistics, a pivotal quantity or pivot is a function of observations and unobservable parameters such that the…
When to use Gaussian family instead of Poisson? The Poisson is a reasonable starting point as it has support for the non-negative integers, but it…
How do you calculate the probability of death? q(x): probability of dying at age x. Also known as the (age-specific) risk of death. Generally these…
Can a GAM be used as a linear model? You can essentially present model results from a GAM as if it were any other linear…
What are the parameters of a four parameter logistic regression? As the name implies, it has 4 parameters that need to be estimated in order…
Can you have two control variables? Variables are just values that can change; a good experiment only has two changing variables: the independent variable and…
What is nested modeling? Two models are nested if one model contains all the terms of the other, and at least one additional term. The…
Do you need to do multiple imputation in Amos? AMOS doesn’t do multiple imputation, but you don’t need it to. It does maximum likelihood. You…