Here’s how I remeber it:
I know that the null hypothesis always contains the “=0”. In this case, Ho = manager’s value-added skill = 0, then I just use this trick to remember the action (DO reject or DO NOT reject)
Type 2 - 2 words - DO NOT reject
Type 1 - 1 word - DO reject
These are errors, so if Type 2 occurs - then the null was not rejected (value - added = 0), when it should have been rejected, and as a result a good manger (with value - added not equal to 0) was fired.