Like many other statistical tests, the z test lets us calculate a test statistic to compare with a critical value, test our hypotheses and find a p-value to test the strength of evidence. The formula ...

As mentioned, the main focus of this masterclass is on the tools – how to construct and interpret basic control charts. After the masterclass you will be able to … construct I, C, U, and P control ...

This paper presents and illustrates a simple statistical test for judging whether one of two materials or treatments is better than the other. The data to which the test is applied consist of paired ...

Series B (Statistical Methodology) of the Journal of the Royal Statistical Society started out simply as the Supplement to the Journal of the Royal Statistical Society in the Society's centenary year ...