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# Half of the subjects in an experiment—the experimental group—consumed

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Manager
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Half of the subjects in an experiment the experimental group [#permalink]

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14 Aug 2012, 11:52
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Half of the subjects in an experiment—the experimental group—consumed large quantities of a popular artificial sweetener. Afterward, this group showed lower cognitive abilities than did the other half of the subjects—the control group—who did not consume the sweetener. The detrimental effects were attributed to an amino acid that is one of the sweetener’s principal constituents.
Which of the following, if true, would best support the conclusion that some ingredient of the sweetener was responsible for the experimental results?
(A) Most consumers of the sweetener do not consume as much of it as the experimental group members did.
(B) The amino acid referred to in the conclusion is a component of all proteins, some of which must be consumed for adequate nutrition.
(C) The quantity of the sweetener consumed by individuals in the experimental group is considered safe by federal food regulators.
(D) The two groups of subjects were evenly matched with regard to cognitive abilities prior to the experiment.
(E) A second experiment in which subjects consumed large quantities of the sweetener lacked a control group of subjects who were not given the sweetener.
[Reveal] Spoiler: OA

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Re: Half of the subjects in an experiment—the experimental group [#permalink]

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14 Aug 2012, 12:10
Its D. This option clearly shows that the cognitive abilities of the two groups evenly matched prior to the experiment. Hence, the detrimental effects post experiment have to be attributed to the sweetner's active ingredients. All other options weakens the conclusion.

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Re: Half of the subjects in an experiment—the experimental group [#permalink]

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14 Aug 2012, 12:36
Answer D. If we negate D the conclusion falls apart.
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Half of the subjects in an experiment—the experimental group—consumed [#permalink]

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24 Jan 2017, 11:31
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Half of the subjects in an experiment—the experimental group—consumed large quantities of a popular artificial sweetener. Afterward, this group showed lower cognitive abilities than did the other half of the subjects—the control group—who did not consume the sweetener. The detrimental effects were attributed to an amino acid that is one of the sweetener’s principal constituents.

Which of the following, if true, would best support the conclusion that some ingredient of the sweetener was responsible for the experimental results?

(A) Most consumers of the sweetener do not consume as much of it as the experimental group members did.
(B) The amino acid referred to in the conclusion is a component of all proteins, some of which must be consumed for adequate nutrition.
(C) The quantity of the sweetener consumed by individuals in the experimental group is considered safe by federal food regulators.
(D) The two groups of subjects were evenly matched with regard to cognitive abilities prior to the experiment.
(E) A second experiment in which subjects consumed large quantities of the sweetener lacked a control group of subjects who were not given the sweetener.
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Re: Half of the subjects in an experiment—the experimental group—consumed [#permalink]

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25 Jan 2017, 01:01
1
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(A) Most consumers of the sweetener do not consume as much of it as the experimental group members did. - Incorrect. Out of scope.

(B) The amino acid referred to in the conclusion is a component of all proteins, some of which must be consumed for adequate nutrition. - Incorrect. Out of scope.

(C) The quantity of the sweetener consumed by individuals in the experimental group is considered safe by federal food regulators. - Incorrect. Irrelevant.

(D) The two groups of subjects were evenly matched with regard to cognitive abilities prior to the experiment. - Correct. Supports the claim mentioned in the argument by stating that there was no disparity between the subjects chosen.

(E) A second experiment in which subjects consumed large quantities of the sweetener lacked a control group of subjects who were not given the sweetener. - Incorrect. Out of context.

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Manager
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Re: Half of the subjects in an experiment—the experimental group—consumed [#permalink]

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25 Jan 2017, 01:14
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Para says There are 2 groups One group had loads of a sweetener and the other didn't. And the abilities of the group which had the sweetener decreased after the intake.

Ques : Pick an answer that proves sweetener is at fault.

Hence D. Earlier there were on same level, then some had sweetener and lost there abilities
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Re: Half of the subjects in an experiment—the experimental group—consumed [#permalink]

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20 Jul 2017, 07:53
I just want to understand if anyone can help me out with this... is the question asking to strengthen the conclusion or guess the assumption?

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Manager
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Re: Half of the subjects in an experiment—the experimental group—consumed [#permalink]

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20 Jul 2017, 10:08
Akankshaa0626 wrote:
I just want to understand if anyone can help me out with this... is the question asking to strengthen the conclusion or guess the assumption?

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Director
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Re: Half of the subjects in an experiment—the experimental group—consumed [#permalink]

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26 Jul 2017, 11:17
Merged topics. Please, search before posting questions!
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Re: Half of the subjects in an experiment—the experimental group—consumed   [#permalink] 26 Jul 2017, 11:17
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