1 The appropriate critical value will be selected from the t distribution again depending on the specific alternative hypothesis and the level of significance.  The third factor is the level of significance. The level of significance which is selected in Step 1 (e.g., Î± =0.05) dictates the critical value. For example, in an upper tailed Z test, if Î± =0.05 then the critical value is Z=1.645.
Definition of sarcasm for English Language Learners. : the use of words that mean the opposite of what you really want to say especially in order to insult someone, to show irritation, or to be funny.
Function: noun. Etymology: from French sarcasme or Latin sarcasmos, both meaning sarcasm, from Greek sarkasmos sarcasm, from sarkazein to tear flesh, bite the lips in rage, sneer, from sark-, sarx flesh. 1 : a remark made usually to hurt someone's feelings or show scorn <a speech full of sarcasms>.