On-line statistics

Binomial and negative-binomial distributions

You should all be familiar with the term "normal distribution". There are other patterns that data can take of which the binomial is one. It should also be a favourite of students because there is no need for a test to assess whether it does follow a binomial distribution. Data that have only two outcomes and are nominal, are binomial data. Examples are on/off, male/female, dead/alive.

Comparisons of such data are easily achieved with non-parametric tests or Chi². However, you may also wish to predict the proportions of male and female turtles emerging from a nest. Since the sex outcome is often temperature dependent, it is a very moot point in terms of conservation. For a given year the proportions can be estimated from previously known data.

Descriptive Stats

Diversity Indices

Comparisons

Correlations

Regression