Aston University biostatistician Dr. Dan Green has identified the top ten errors he commonly sees in research papers in his ...

A three sigma limit is a statistical calculation that refers to data within three standard deviations from a mean. It shows ...

Milestone articles have highlighted the frequency and types of statistical errors in research,1–5 yet fundamental errors ...

During his Ph.D. research, mathematician Tyron Lardy worked on a new approach to hypothesis testing. Instead of the ...

Numerous examples from clinical research are worked through both manually and using SAS. Methods presented include t-tests, analysis of variance, repeated measures ANOVA, linear regression, analysis ...

Think of this type of research, sometimes called statistical research, ... If you wanted to study the topic of college binge drinking, for example, you might use the case study approach.

The subsample sizes ranged from 2,000 to 8,000 in increments of 500. 9 Each of the weighting methods was applied twice to each simulated survey dataset (subsample): once using only core demographic ...

Quantitative research really targets the statistics and size of your target customer, ... When doing qualitative research, consider these examples to use or modify to suit your business needs.

Course TopicsPower analyses and sample size calculations are important parts of many research projects. Often, before data are even collected, it is necessary to calculate and justify the required ...

Low statistical power undermines the purpose of scientific research; it reduces the chance of detecting a true effect. Perhaps less intuitively, low power also reduces the likelihood that a ...

Statistical significance determines that a relationship between two or more variables is caused by something other than chance. It provides a p-value or probability.