# Tag Info

### Binomial GLM for attracting large mammal from presence/absence data

You shouldn't do model selection (ie. use AIC or ANOVA F-test) to decide whether to keep or drop the interaction term. From a science point of view: You started the investigation with the hypothesis ...

### Confidence interval in logistic regression when probability of success is 1

Well, this is kind of a fact of life for logit models. A probability of 1 comes out as $+\infty$ on the logit scale, and it's pretty hard to construct a confidence interval around that. If you regrid ...
Accepted

### Average Sample Size For Curtailed Double Sampling Plan

This comes down to an analysis of "curtailment" (which is a simplified version of sequential sampling). Let's focus on that first. Because I think your reference is incorrect, I will be ...

### normal approximation to the binomial distribution: why np>5?

To fill in some details for the answer by @GeoMatt22: Consider a binomial random variable with parameters $n$ and $p$, so that its mean $\mu=np$ and its variance $\sigma^2=np(1-p)$. For a number $z$ ...

### Is the mean of the left-truncated binomial distribution convex in p?

Since the function of interest is defined over a continuum of real values of $p$ you can check its convexity using standard calculus methods. Consider a general ratio function: f(p) = \frac{g(p)}{h(...