病例:某年某地总人口数为N,采用整群抽样,对某一社区共n人进行了抽样调查,现有某病患者n
(来学网)![](http://cdn.laixue.com/exam/10508168/TestImages/1.gif)
例,其中今年新发该病患者n
![](http://cdn.laixue.com/exam/10508168/TestImages/2.gif)
例,下列关于该病统计指标的描述正确的是
- 欲计算该病的患病率,正确的公式是
A. n
(来学网)![](http://cdn.laixue.com/exam/10508168/TestImages/1.gif)
/N×100%
B. n
(来学网)![](http://cdn.laixue.com/exam/10508168/TestImages/1.gif)
/n×100%
C. n
(来学网)![](http://cdn.laixue.com/exam/10508168/TestImages/2.gif)
/N×100%
D. n
(来学网)![](http://cdn.laixue.com/exam/10508168/TestImages/2.gif)
/n×100%
E. (n
(来学网)![](http://cdn.laixue.com/exam/10508168/TestImages/1.gif)
+n
![](http://cdn.laixue.com/exam/10508168/TestImages/2.gif)
)/n×100%
- 欲计算该病的发病率,正确的公式是
A. n
(来学网)![](http://cdn.laixue.com/exam/10508168/TestImages/1.gif)
/N×100%
B. n
(来学网)![](http://cdn.laixue.com/exam/10508168/TestImages/1.gif)
/n×100%
C. n
(来学网)![](http://cdn.laixue.com/exam/10508168/TestImages/2.gif)
/N×100%
D. n
(来学网)![](http://cdn.laixue.com/exam/10508168/TestImages/2.gif)
/n×100%
E. (n
(来学网)![](http://cdn.laixue.com/exam/10508168/TestImages/1.gif)
+n
![](http://cdn.laixue.com/exam/10508168/TestImages/2.gif)
)/n×100%