A common objective in applying a statistical test is to compare the mean (average) of one sampled group with some hypothesized mean or the mean of a population. For example, you might want to compare ...

A z-test is a statistical test used to determine whether two population means are different when the variances are known and the sample size is large.

By studying the properties of small sample sizes, William Sealy Gosset developed a statistical test that required fewer samples to produce a reasonable result.

Beta risk is the probability that a false null hypothesis will be accepted by a statistical test.

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 ...

This study applies an old, though little used statistical test of authorship-a word-length frequency test-to show that Twain almost certainly did not write these 10 letters. The statistical analysis ...