Suppose the null hypothesis of a study is that the average a

Suppose the null hypothesis of a study is that the average age of a worker in a large corparation s 37 years. To test this, a researcher gathers sample data & the mean of the sample ata is close enough to the 37 years that the resercher decides not to reject the null hypothesis. However, the actual averahe of the worker in the corparation is 36 yers. What has the researcher done?

A) committed a tyoe 1 error

B) made a correct decision

C) Increased the power of the study

D) Committed a type 2 error

Solution

Type I error occurs when a true null hypothesis is rejected,
which is impossible if the null hypothesis is in fact false. In this situation Type I error is committed.

Therefore, the correct option is (A).