A recent survey showed that 50 percent of people polled : GMAT Critical Reasoning (CR)
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A recent survey showed that 50 percent of people polled

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A recent survey showed that 50 percent of people polled [#permalink]

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29 Apr 2005, 05:57
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A recent survey showed that 50 percent of people polled believe that elected officials should resign if indicted for a crime, whereas 35 percent believe that elected officials should resign only if they are convicted of a crime. Therefore, more people believe that elected officials should resign if indicted than believe that they should resign if convicted.

The reasoning above is flawed because it

(A) draws a conclusion about the population in general based only on a sample of that population
(B) confuses a sufficient condition with a required condition
(C) is based on an ambiguity of one of its terms
(D) draws a conclusion about a specific belief based on responses to queries about two different specific beliefs
(E) contains premises that cannot all be true
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29 Apr 2005, 06:06
"A" for me.

a sample cannot represent entire population.
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29 Apr 2005, 09:05
I'll pick B.
35 percent - convicted of a crime - ie. convicted is required condition.
50 percent - indicted for a crime => convicted is sufficient condition.

ie. 50 = 35 + (elected officials should resign even if indicted)
Thus the reasoning is false.
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29 Apr 2005, 09:30
One more for A - looks more like an AWA question
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29 Apr 2005, 11:16
B)...

people who are convicted are indicted as well. so the % of people who think that a convicted officer should resign might be higher because this group contains the first group as well as the second group. so the argument confuses a sufficient condition (indicted) with a required condition (convicted) and makes an illogical conclusion.

IMO its not A) because nowhere in the argument is stated that its only a sample of the population.
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30 Apr 2005, 04:19
sonaketu wrote:
I'll pick B.
35 percent - convicted of a crime - ie. convicted is required condition.
50 percent - indicted for a crime => convicted is sufficient condition.

ie. 50 = 35 + (elected officials should resign even if indicted)
Thus the reasoning is false.

Very true It has to be B.

Saurabh Malpani
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01 May 2005, 23:07
christoph wrote:
B)...

people who are convicted are indicted as well. so the % of people who think that a convicted officer should resign might be higher because this group contains the first group as well as the second group. so the argument confuses a sufficient condition (indicted) with a required condition (convicted) and makes an illogical conclusion.

IMO its not A) because nowhere in the argument is stated that its only a sample of the population.

Hi, but the conclusion is that more people believe that elected officials should resign if indicted than believe that they should resign if convicted.

I cannot get your explanation, would you explain more?

thanks
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02 May 2005, 02:16
my reasoning is wrong !

i think that the reasoning is in that way flawed that the author makes his conclusion due to the %, which is not necessary, because there is no way that the number of people who think that a convicted official should resign will be greater than the number of people who think that a indicted offcial should resign. the "corpus delicti" of conviction is subset of indiction. so the set of people (think indicted) will always be greater than the subset (think convicted). so its a flaw to combine these two conditions as the basis for the conclusion, because you cannot compare them, because they are on different setlevels. when the author says "therefore" he refers to the %, but that is flawed because the reason of the conclusion is not that 50% is greater than 30% but because the second group is a subset of the first group.

maybe somone can explain it better...
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02 May 2005, 14:41
I also fell in the trap. U guys are gr8. It has to be (B).

Thanks sonaketu/cristoph for the explaination.
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03 May 2005, 08:59
christoph wrote:
my reasoning is wrong !

i think that the reasoning is in that way flawed that the author makes his conclusion due to the %, which is not necessary, because there is no way that the number of people who think that a convicted official should resign will be greater than the number of people who think that a indicted offcial should resign. the "corpus delicti" of conviction is subset of indiction. so the set of people (think indicted) will always be greater than the subset (think convicted). so its a flaw to combine these two conditions as the basis for the conclusion, because you cannot compare them, because they are on different setlevels. when the author says "therefore" he refers to the %, but that is flawed because the reason of the conclusion is not that 50% is greater than 30% but because the second group is a subset of the first group.

maybe somone can explain it better...

Yes, I agree with your above-mentioned reasoning.

But I cannot figure out why it relates to sufficient and necessary conditions.
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03 May 2005, 12:04
chunjuwu wrote:
christoph wrote:
my reasoning is wrong !

i think that the reasoning is in that way flawed that the author makes his conclusion due to the %, which is not necessary, because there is no way that the number of people who think that a convicted official should resign will be greater than the number of people who think that a indicted offcial should resign. the "corpus delicti" of conviction is subset of indiction. so the set of people (think indicted) will always be greater than the subset (think convicted). so its a flaw to combine these two conditions as the basis for the conclusion, because you cannot compare them, because they are on different setlevels. when the author says "therefore" he refers to the %, but that is flawed because the reason of the conclusion is not that 50% is greater than 30% but because the second group is a subset of the first group.

maybe somone can explain it better...

Yes, I agree with your above-mentioned reasoning.

But I cannot figure out why it relates to sufficient and necessary conditions.

conviction is a required condition. it is required that the person is convicted. so we compare a required condition to another required condition. but in the argument the author confuses a sufficient condition (indiction) with a required condition and compares it to the other required condition (conviction). in the argument, indiction is the sufficient condition, because it is sufficient that a person is indicted regardless of the conviction of the person.

does anyone understand this confusing scribble
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03 May 2005, 23:40
christoph wrote:
chunjuwu wrote:
christoph wrote:
my reasoning is wrong !

i think that the reasoning is in that way flawed that the author makes his conclusion due to the %, which is not necessary, because there is no way that the number of people who think that a convicted official should resign will be greater than the number of people who think that a indicted offcial should resign. the "corpus delicti" of conviction is subset of indiction. so the set of people (think indicted) will always be greater than the subset (think convicted). so its a flaw to combine these two conditions as the basis for the conclusion, because you cannot compare them, because they are on different setlevels. when the author says "therefore" he refers to the %, but that is flawed because the reason of the conclusion is not that 50% is greater than 30% but because the second group is a subset of the first group.

maybe somone can explain it better...

Yes, I agree with your above-mentioned reasoning.

But I cannot figure out why it relates to sufficient and necessary conditions.

conviction is a required condition. it is required that the person is convicted. so we compare a required condition to another required condition. but in the argument the author confuses a sufficient condition (indiction) with a required condition and compares it to the other required condition (conviction). in the argument, indiction is the sufficient condition, because it is sufficient that a person is indicted regardless of the conviction of the person.

does anyone understand this confusing scribble

Hi, why you said conviction is a required condition?

A men who is convicted must be indicted, but if he is indicted, he may or may not be convicted.

I think conviction, which can determine indiction, is a sufficient condition and indiction is a required condition.

Any wrong?
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03 May 2005, 23:53
chunjuwu wrote:
christoph wrote:
chunjuwu wrote:
christoph wrote:
my reasoning is wrong !

i think that the reasoning is in that way flawed that the author makes his conclusion due to the %, which is not necessary, because there is no way that the number of people who think that a convicted official should resign will be greater than the number of people who think that a indicted offcial should resign. the "corpus delicti" of conviction is subset of indiction. so the set of people (think indicted) will always be greater than the subset (think convicted). so its a flaw to combine these two conditions as the basis for the conclusion, because you cannot compare them, because they are on different setlevels. when the author says "therefore" he refers to the %, but that is flawed because the reason of the conclusion is not that 50% is greater than 30% but because the second group is a subset of the first group.

maybe somone can explain it better...

Yes, I agree with your above-mentioned reasoning.

But I cannot figure out why it relates to sufficient and necessary conditions.

conviction is a required condition. it is required that the person is convicted. so we compare a required condition to another required condition. but in the argument the author confuses a sufficient condition (indiction) with a required condition and compares it to the other required condition (conviction). in the argument, indiction is the sufficient condition, because it is sufficient that a person is indicted regardless of the conviction of the person.

does anyone understand this confusing scribble

Hi, why you said conviction is a required condition?

A men who is convicted must be indicted, but if he is indicted, he may or may not be convicted.

I think conviction, which can determine indiction, is a sufficient condition and indiction is a required condition.

Any wrong?

no, conviction is the required and indiction is the sufficient condition in this context. it is sufficient that the officials are indicted for the people to demand that they should resign. "sufficient" is like a minimal requirement. so thats the indiction. "convicted" is like an add-on . that makes the condition more specific and hence is the required condition.
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03 May 2005, 23:53
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