Accuracy assessment methods and current challenges
Accuracy assessment methods and current challenges
Accuracy assessment methods and current challenges
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e.g. common scenario v another accuracy<br />
n′<br />
=<br />
( z<br />
+<br />
2<br />
α / 2<br />
2PQ<br />
z<br />
β<br />
P1<br />
Q1<br />
P2<br />
Q2<br />
)<br />
( P − P ) 2<br />
2<br />
1<br />
+<br />
<strong>and</strong> with continuity correction:<br />
n<br />
=<br />
n′<br />
⎛<br />
⎜1+<br />
1+<br />
4<br />
n′<br />
p<br />
p<br />
4 ⎟ ⎝<br />
2<br />
−<br />
1 ⎠<br />
⎞<br />
2<br />
Use acquired data to test for difference using:<br />
z<br />
=<br />
P<br />
1<br />
− P<br />
2<br />
−<br />
1<br />
2<br />
(<br />
1<br />
n<br />
+<br />
⎛ 1<br />
p(1<br />
− p)<br />
⎜ +<br />
⎝ n1<br />
1<br />
1<br />
n<br />
2<br />
1<br />
n<br />
2<br />
)<br />
⎞<br />
⎟<br />
⎠
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