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# A series of experiments was conducted in which rats of various ages we

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SVP
Joined: 12 Dec 2016
Posts: 1675
Location: United States
GMAT 1: 700 Q49 V33
GPA: 3.64
A series of experiments was conducted in which rats of various ages we  [#permalink]

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14 Dec 2017, 10:06
00:00

Difficulty:

5% (low)

Question Stats:

95% (01:03) correct 5% (00:43) wrong based on 75 sessions

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A series of experiments was conducted in which rats of various ages were placed in a series of mazes and timed to see how long it took them to find their way out. In the first set of runs, the younger rats made their way out of the mazes an average of 30 percent faster than the older rats. Three days later, however, when the same rats were placed in the same mazes, the older rats were faster by nearly 40 percent.

Which of the following hypothesis best accounts for the findings of the experiments?

(A) A rat’s sense of smell becomes less acute as it gets older.

(B) The older rats had been used in earlier experiments.

(C) Older rats have better-developed sensory memory, which allows them to “remember” the mazes three days later.

(D) Younger rats become frustrated when faced with repeated dead ends in a maze, while older rats do not.

(E) Older rats tire more easily than younger rats.
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Joined: 13 Jun 2012
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Re: A series of experiments was conducted in which rats of various ages we  [#permalink]

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14 Dec 2017, 12:53
The question is looking for the reason why older rats were faster than younger rats when the experiment was tried again.

C says Older rats have better-developed sensory memory, which allows them to “remember” the mazes three days later.
This clearly states the reason- they could just remember the maze better. Hence faster. All other options fall short.
Intern
Joined: 10 Jul 2016
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Concentration: Technology, General Management
GMAT 1: 550 Q36 V30
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Re: A series of experiments was conducted in which rats of various ages we  [#permalink]

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14 Dec 2017, 13:17
C. Older rats remembered the route later which helped them come out of the maze sooner.
Whereas the younger ones forgot the route so took comparatively greater time to figure out the route

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Joined: 26 Aug 2016
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WE: Information Technology (Consulting)
Re: A series of experiments was conducted in which rats of various ages we  [#permalink]

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27 Apr 2018, 22:38
chesstitans wrote:
A series of experiments was conducted in which rats of various ages were placed in a series of mazes and timed to see how long it took them to find their way out. In the first set of runs, the younger rats made their way out of the mazes an average of 30 percent faster than the older rats. Three days later, however, when the same rats were placed in the same mazes, the older rats were faster by nearly 40 percent.

Which of the following hypothesis best accounts for the findings of the experiments?

(A) A rat’s sense of smell becomes less acute as it gets older.

(B) The older rats had been used in earlier experiments.

(C) Older rats have better-developed sensory memory, which allows them to “remember” the mazes three days later.

(D) Younger rats become frustrated when faced with repeated dead ends in a maze, while older rats do not.

(E) Older rats tire more easily than younger rats.

I will go with C.

D totally threw me up laughing. *giggle* I read it like "Younger rats become frustrated when faced with repeated mazes, while older rats do not." .
Re: A series of experiments was conducted in which rats of various ages we &nbs [#permalink] 27 Apr 2018, 22:38
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