Statistics Dictionary
To see a definition, select a term from the dropdown text box below. The statistics
dictionary will display the definition, plus links to related web pages.
Select term:
Test Statistic
In hypothesis testing, the test statistic is a value computed from sample
data. The test statistic is used to assess the strength of evidence in
support of a
null hypothesis.
Suppose the test statistic in a hypothesis test is equal to S.
If the probability of observing a test statistic as extreme as
S is less than the
significance level,
we reject the null hypothesis.