Types of Error in Hypothesis Tests ' When we carry out a test, what types of errors we can make? Type I error: Reject H0 when H0 is actually true. Court trial: Conclude that the person is guilty when he/she is actually innocent Bioxx: ('onclutlc that the percentage ol'patients with adverse eil'ects is more than Conclude someone has a bad disease (positive for diseases) when they are really healthy (negative for 10%. when it actually is 109-}; the disease, Type 11 error: Not reject H0 when H0 is actually false (H A is true.) Court trial: Conclude that the person is innocent when he/she is actually guilty Bioxx: Conclurle that the percentage oi'patients with adverse eil'ects is 109-13\" when it actually is more than lU'E-"n 4'4 Think of H70 as a suspect in a crime. Ityou reject their truth when they are innocent that is type 1 If you accept their truth when theyr are lyinglguilty that is type 2