Errors
Type II
Correct
Keep H0
Correct
Type I
Reject H0
H0 False
H0 True
a
- reject H0 when true
= Type I
b
- accept H0 when false = Type II (more serious)
1. a & b are inversely related
2.
lowering a reduces Type I, increases prob. of
Type II
3. Moral Ð
we can never be 100% sure of our results