求教OG-87-置疑答案和自己

snow_mountain

以下是引用pumpkin在2004-4-17 2:13:00的发言：

og-114. The more frequently employees take time to exercise during working hours each week, the fewer sick days they take. Even employees who exercise only once a week during working hours take less sick time than those who do not exercise. Therefore, if companies started fitness programs, the absentee rate in those companies would decrease significantly.

Which of the following, if true, most seriously weakens the argument above?

(A) Employees who exercise during working hours occasionally fall asleep for short periods of time after they exercise.

(B) Employees who are frequently absent are the least likely to cooperate with or to join a corporate fitness program.

(C) Employees who exercise only once a week in their company’s fitness program usually also exercise after work.

(D) Employees who exercise in their company’s fitness program use their working time no more productively than those who do not exercise.

(E) Employees who exercise during working hours take slightly longer lunch breaks than employees who do not exercise.

这个题目偶理解是A-B模式的方法论. 方法companies started fitness programs. 方法本身的正确性已经证明了. 问题就是方法是不是可行

E选项就是指出, 方法虽然好, 但是方法不能作用在该去作用的人头上, 那么就是方法不能实现那个目的. 这里就是方法的可行性. 不要求方法的唯一性.

请求指教

不懂什么叫A-B.  当初刚看CR时,也看过. 不过没搞明白.  后来也没再看.

E 的错误在于无干项.  人家说ABSTENTEE, 你回答什么LUNCH BREAK. 根本就是无关嘛.

没看懂MM 的可行, 唯一的观点.

上面那段很复杂的东东也没看懂.  

你想得太多了. 多看OG的解释. OG怎么说, 你就怎么跟着他的思路想. 多看看就明白了. 嘻嘻. TAKE IT EASY.

Across

嘻嘻嘻, 不好意思, 是

B选项就是指出, 方法虽然好, 但是方法不能作用在该去作用的人头上, 那么就是方法不能实现那个目的. 这里就是方法的可行性. 不要求方法的唯一性.

手误

嗯, 明白了.

继续看

hanson_luo

我还是想不同这题。请教各位，如果3次test，positive results的错误率60%,80%,90%, 3次negative result的错误率都一样，都是20％(满足E选项), 是不是还是要使用3次positive results中最低的一次，60％错误率的呢？

hanson_luo

UP UP

hanson_luo

没人理我，再up

he_cathy

谁能帮忙解释一下OG87的D为什么不对？谢谢！！

lawyer_1

该方法的目的是为了最精确的检测P病，即将错误率降到最低。如果试验没结果，它不能说明该试验是对还是错，没结果的试验会被放弃。并不影响错误率，故不起支持作用。

yingtian1234

已知：通过lab的方法，判断错误的阳性检查结果所占比率低；选项：判断错误的阴性的检查结果比率也那么低。

说明：阴性阳性的判断错误比率都低－－》lab方法好

aaa1sss

good, I miss the detail of the negative and the positive difference, thank you !