COVID-19 disruption of clinical trials is likely to result in missing data, disrupted timelines, and perhaps patient population changes. We thought we would dedicate a blog post to the actions that can be considered when a study is facing the issue of missing data. The COVID-19 situation is clearly still developing and regulators are still…
In ecotoxicology statistics there are three main types of data: Continuous data can take any numerical value over a range (e.g. weight), while discrete data take a finite number of values (e.g. colour). Quantal data, the focus of this post, can take only one of two values (e.g. alive/dead or mobile/immobile) and are often recorded…
Ecotoxicity tests are experiments performed to evaluate the toxicity of a test substance in order to predict the effect on natural populations. There are many different types of test, but the general principle is that organisms are exposed to different concentrations or doses of a test substance, with at least one control group that is…