GLIMMPSE Tutorial: One-sample t-test 2 false null hypothesis, called Type II Error, is denoted by β. The possible outcomes of a hypothesis test are summarized in the table below along with the conditional probabilities of their occurrence. State of Nature Hypothesis Testing Decision H A one-tailed test is a statistical test in which the critical area of a distribution is one-sided so that it is either greater than or less than a certain value, but not both. ... How Type II ... An R tutorial on the type II error in upper tail test on population mean with unknown variance. Feb 01, 2013 · An example of calculating power and the probability of a Type II error (beta), in the context of a Z test for one mean. Much of the underlying logic holds fo... a type II error) if 1:960 Z 1:960 2. Since sample Z= x 125500 30000= p 40, we fail to reject if 125500 1:96(30000= p 40) x 125500 + 1:96(30000= p 40) - that is, if 116202 x 134797 3. The probability of this result is P(116202 x 134797j = 118000) = P 116202 118000 30000= p 40 Z 134797 118000 30000= p 40 =