Critical Value
-separates the critical region from the noncritical region.  The symbol for critical value is C.V.

Critical or Rejection Region
-is the range of values of the test value that indicates that there is a significant difference and that the null hypothesis should be rejected.

Noncritical or Non rejection Region
-a range of values of the test that indicates that the difference was probably due to chance and that the null hypothesis should not be rejected.






G.K. Elio