94. When 100 people who have not used cocaine are tested for cocaine use, on average only 5 will test positive. By contrast, of every 100 people who have used cocaine 99 will test positive. Thus, when a randomly chosen group of people is tested for cocaine use, the vast people is tested for cocaine use, the vast majority of those who test positive will be people who have used cocaine.
A reasoning error in the argument is that the argument
(A) attempts to infer a value judgement from purely factual premises
(B) attributes to every member of the population the properties of the average member of the population
(C) fails to take into account what proportion of the population have used cocaine
(D) ignores the fact that some cocaine users do not test positive
(E) advocates testing people for cocaine use when there is no reason to suspect that they have used cocaine
Please explain your answers. Thanks.
Id say C.
B: Honestly, I can't really make sense of this one. I think it means that all people are equal in the population. Im not really sure so I didnt essentially rule this out, but chose C over this.
A: No way.
D: Doesnt ignore this fact at all. In fact it uses this premise for its argument.
E: Does not advocate. This is never suggested.