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A pharmaceutical company tested a new diet drug over a two-month perio

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A pharmaceutical company tested a new diet drug over a two-month perio  [#permalink]

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New post Updated on: 29 Dec 2018, 01:16
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A
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D
E

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Question Stats:

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A pharmaceutical company tested a new diet drug over a two-month period. The test group of 100 dieters lost an average of five pounds per person during the first month, but gained an average of two pounds per person in the second month.

All of the following could help explain the results of the experiment except:

A. The second month of the test occurred during a holiday season, when people are more likely to gain weight.
B. The diet drug has unpleasant side effects, causing many of the subjects to stop using the drug after the first month.
C. The pharmaceutical company provided low-calorie diets to the test subjects in the first month, but let the dieters choose their own food in the second month.
D. The pharmaceutical company selected for the test people who were 20 to 40 pounds over their ideal weights.
E. The diet drug relies on a metabolic effect that loses efficacy the longer a person takes the drug

Source: McGraw Hill's GMAT
Difficulty Level: 600

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Originally posted by SajjadAhmad on 06 Jan 2017, 20:15.
Last edited by SajjadAhmad on 29 Dec 2018, 01:16, edited 1 time in total.
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Re: A pharmaceutical company tested a new diet drug over a two-month perio  [#permalink]

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New post 06 Jan 2017, 22:58
SajjadAhmad wrote:
A pharmaceutical company tested a new diet drug over a two-month period. The test group of 100 dieters lost an average of five pounds per person during the first month,
but gained an average of two pounds per person in the second month.

All of the following could help explain the results of the experiment except:

A. The second month of the test occurred during a holiday season, when people are more likely to gain weight.
B. The diet drug has unpleasant side effects, causing many of the subjects to stop using the drug after the first month.
C. The pharmaceutical company provided low-calorie diets to the test subjects in the first month, but let the dieters choose their own food in the second month.
D. The pharmaceutical company selected for the test people who were 20 to 40 pounds over their ideal weights.
E. The diet drug relies on a metabolic effect that loses efficacy the longer a person takes the drug


Goin with D...


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Re: A pharmaceutical company tested a new diet drug over a two-month perio  [#permalink]

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New post 07 Jan 2017, 01:18
D, Rest all clearly explains as to why there was an increase in weight in the 2nd month

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Re: A pharmaceutical company tested a new diet drug over a two-month perio  [#permalink]

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New post Updated on: 07 Jan 2017, 07:09
SajjadAhmad wrote:
A pharmaceutical company tested a new diet drug over a two-month period. The test group of 100 dieters lost an average of five pounds per person during the first month,
but gained an average of two pounds per person in the second month.

All of the following could help explain the results of the experiment except:

A. The second month of the test occurred during a holiday season, when people are more likely to gain weight.
B. The diet drug has unpleasant side effects, causing many of the subjects to stop using the drug after the first month.
C. The pharmaceutical company provided low-calorie diets to the test subjects in the first month, but let the dieters choose their own food in the second month.
D. The pharmaceutical company selected for the test people who were 20 to 40 pounds over their ideal weights.
E. The diet drug relies on a metabolic effect that loses efficacy the longer a person takes the drug


Only choice D contributes nothing to the results of the experiment. Other choices help explain why dieters first lost weight but later gain weight again.
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Originally posted by broall on 07 Jan 2017, 01:21.
Last edited by broall on 07 Jan 2017, 07:09, edited 1 time in total.
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Re: A pharmaceutical company tested a new diet drug over a two-month perio  [#permalink]

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New post 07 Jan 2017, 06:27
Choice D. This experiment is for the same sample and the new information does not explain why they lose or gain weight

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Re: A pharmaceutical company tested a new diet drug over a two-month perio  [#permalink]

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New post 27 Dec 2018, 14:57
SajjadAhmad wrote:
A pharmaceutical company tested a new diet drug over a two-month period. The test group of 100 dieters lost an average of five pounds per person during the first month,
but gained an average of two pounds per person in the second month.

All of the following could help explain the results of the experiment except:

A. The second month of the test occurred during a holiday season, when people are more likely to gain weight.
B. The diet drug has unpleasant side effects, causing many of the subjects to stop using the drug after the first month.
C. The pharmaceutical company provided low-calorie diets to the test subjects in the first month, but let the dieters choose their own food in the second month.
D. The pharmaceutical company selected for the test people who were 20 to 40 pounds over their ideal weights.
E. The diet drug relies on a metabolic effect that loses efficacy the longer a person takes the drug


Official Explanation:

ANSWER:D This answer provides no explanation for the difference in weight loss experienced by the test subjects over the first and second months, while all of the other answers provide explanations.
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Re: A pharmaceutical company tested a new diet drug over a two-month perio   [#permalink] 27 Dec 2018, 14:57
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