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.
Noun. 1. sarcasm-witty language used to convey insults or scorn; he used sarcasm to upset his opponent; irony is wasted on the stupid; Satire is a sort of glass, wherein beholders do generally discover everybody's face but their own--Jonathan Swift. caustic remark, irony, satire.