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.
As with satire, sarcasm depends on the listener or reader to be in on the joke. Sarcasm is insincere speech. Your mom asks if you're excited to start cleaning the kitchen and you say, Yeah, right, when you mean Heck no.. Take this exchange from The Hunger Games.