egmat
To determine the extent of tax fraud, the Internal Revenue Service audited the current year tax returns of a random set of 1000 individuals. Even though only 10% of the individuals in the group were self-employed (other 90% were working professionals), they accounted for 50% of the fraudulent cases.
For the group above, which of the following would be most useful in assessing whether tax fraud by self-employed individuals may be responsible for majority of the money that the IRS loses every year?
A. The trend of average income of self-employed individuals over the past few years compared to that of the rest of the group.
B. The difference between average annual taxes paid by a self-employed individual and a working professional.
C. The average tax fraud committed by a self-employed individual versus a working professional.
D. The diversity of demographics represented in the group versus that of the nation.
E. The number of women in the group who were working professionals versus self-employed.
I chose D and not C and my reasoning was that the sample must be representative of the actual population.
In the sample, it might very well be the case that those 10% are responsible for 50% of the fraudulent cases (even monetarily) but if in the real world those 10% actually accounted for only 1%. Then, of course, they wouldn't be responsible for the "MAJORITY" of the cases.
Yes, it is important to know the average tax fraud they commit but then, even if you do know the average fraud they commit, it is impossible to say that they are responsible for the majority of the tax fraud without knowing their representation in the real world.
I don't know - I don't think the GMAT would draft such a question. At least I hope not. In any case, I would like to know where I am off with my thought process.
AjiteshArun,
daagh,
Magoosh,
GMATNinjaThanks
Anudeep