The investigator's working hypothesis (also called theĀ experimental hypothesis), which in null hypothesis significance testing (NHST) is in opposition to the null hypothesis (H_{0}).
beta
Probability of a Type II error.
null hypothesis
The hypothesis to be nullified; usually states that there is no relationship between two or more variables.
power
In significance testing, the probability of not making a Type II error.
p value
Probability value or level obtained in a test of significance.
Type I error
The error of rejecting the null hypothesis when it is true.
Type II error
The error of failing to reject the null hypothesis when it is false.