In classical statistics, it’s the baseline, or the hypothesis to which you ... M: a value we’re testing against, µ: the sample average Next we calculate the test statistic, z.

and the rejection region for a hypothesis test. Give the form of a rejection region. Perform tests concerning a true population variance. Compute the sampling distributions for the sample mean and ...

Unless you have a good reason, just stick with the default two-tailed test. Statistical significance is concerned with whether the null hypothesis is true or not. In the example we have used, our null ...

Clinical researchers, with or without a statistical background, will find this book an invaluable aid in understanding the statistical methods cited most frequently in clinical protocols, statistical ...

The first thing any scientist does before performing an experiment is to form a hypothesis about the experiment's outcome. This often takes the form of a null hypothesis, which is a statistical ...