B. How low is too low?
Suppose we measured out each coffee can and calculated a sample mean weight of 2.99 pounds.
Do you think this is enough evidence to reject Ho and conclude that Hilltop is underfilling their cans? Probably not.
If we did reject Ho, we might make a type I error.
What if x-bar was 1.99 pounds? Maybe this is too low and we should reject Ho.