The correct statistical measures to reflect differences
 From: "ela" <ela@xxxxxxxxxx>
 Date: Mon, 9 Aug 2010 09:39:28 +0800

Scenario A:
treatment num percent
drug 75 54%
placebo 300 12%
as S.D. is not known for both groups, C.I. cannot be applied. what else
statistics can be used to reflect the difference?
Scenario B:
Site IDs accident number
1 1
2 0
3 2
4 3
5 0
.....
1995 0
1996 2
1997 1
1998 0
1999 3
2000 0
The accident event is rare but we want to know whether it occurs more than
purely by chance. What statistical measure can we use for reference?
.
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