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.
I. What is Sarcasm? Sarcasm is a form of verbal irony that mocks, ridicules, or expresses contempt. Itâs really more a tone of voice than a rhetorical device. Youâre saying the opposite of what you mean (verbal irony) and doing it in a particularly hostile tone.