A test is made of H0: mean = 27 versus H1: mean < 27. The true value of the mean is 27, and H0 is rejected. Is this a Type I error, Type II error, or a correct decision? How do I determine which is which???

Question

Question 4 options:


1) Type II error

2) Type I error

3) Correct decision

Answer 1

This is definitly an error because Ho was rejected when it was true.

Google Type I and Type II errors and you will find the definition of each and then you will be able to figure out which error happened here.