True-False A type I error has been committed when the null…
True-False A type I error has been committed when the null hypothesis is false and there is a failure to reject it. A Type II error occurs whenever the test statistic does not fall in the critical region when the null hypothesis is actually false. If the sample size is increased when performing the z test for a mean, then for a fixed level of significance, the probability of committing a Type II error will be reduced.