The term error is used in two different ways in hypothesis t

The term error is used in two different ways in hypothesis testing: a Type I error (or Type II) and the standard error. a. What can a researcher do to influence the size of the standard error? Does this action have any effect on the probability of a Type I error? b. What can a researcher do to influence the probability of a Type I error? Does this action have any effect on the size of the standard error?

Solution

A. A standard error can be decreased by increasing the sample size. Changes in sample size have no effect on the probability of a Type I error.

B. The probability of a Type I error is determined by selecting the alpha level for the test. The choice of an alpha level does not affect the value of standard error.