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0
0.05
0.1
0.15
0.2
0.25
0
2.5
5
7.5
10 12.5 15
H
0
0
0.05
0.1
0.15
0.2
0.25
0
2.5
5
7.5
10 12.5 15
H
0
H
a
Type II Error Rate
b
: Probability of accepting a false H0
If H
a
is true
(disease):
Type I Error Rate
a
: probability of rejecting a true H
0
f
f
If H
0
is true
(no disease):
Test value
Test value
FN
FN