At times we wish to examine statistical evidence, and determine whether it supports or contradicts a claim that has been made (or that we might wish to make) concerning the entire population. This is ...

Michael Lew has received funding from the NHMRC. Yesterday’s article by Geoff Cumming, based on a very recent Proceedings of the National Academy of Science paper, argued that “null hypothesis ...

Researchers from Northwestern University, University of Pennsylvania, and University of Colorado published a new Journal of Marketing study that proposes abandoning null hypothesis significance ...

What? Perhaps primary among the challenges and conditions that face life scientists is the infinite variability between individuals. An important tool for measuring those disparities is the Null ...

If we repeat this exercise for a null hypothesis that is improbable a priori, p (H) = .2, we find that indifference is achieved if VH drops to .0625 in conventional testing and to .235 in tough ...

In applied research, an effect size is specified in advance and defines a threshold for decision-making. Power analyses of a specific desired effect size may then be carried out before an experiment ...

Add Yahoo as a preferred source to see more of our stories on Google. Careful planning and analysis are part of trying to reduce the chance of a false-positive finding. Arnon Mungyodklang/iStock via ...

Hypothesis testing is a formal procedure for investigating our ideas about the world using statistics. It is most often used by researchers to test predictions, called hypotheses. The first step in ...

At times we wish to examine statistical evidence, and determine whether it supports or contradicts a claim that has been made (or that we might wish to make) concerning the entire population. This is ...

Should you believe the findings of scientific studies? Amid current concerns about the public's trust in science, old arguments are resurfacing that can sow confusion. Subscribe to our newsletter for ...