A number that the test statistic needs to exceed in order to reject the null hypothesis. In some situations, the null hypothesis is rejected for small values of the test statistic, and in these cases the test statistic needs to be less than the critical value. An alternative convention is to include the critical value itself in the rejection region. Since the test statistic is rarely exactly equal to the critical value, this alternative convention differs inconsequentially from the other.
a value that a statistic must surpass in order to have a hypothesis test result in rejection of the null hypothesis
The value at which a decision rule triggers significance.
A probability value obtained from statistical tables that indicates the value of the obtained test statistic needed in order for the result to be deemed statistically significant.
The value that a test statistic must exceed (in a absolute value sense) in order for the null hypothesis to be rejected.
In differential topology, a critical value of a differentiable function between differentiable manifolds is the of a critical point.