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10 Oct 2020, 23:37
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
95%
(hard)
Question Stats:
39% (01:48) correct
61%
(01:49)
wrong
based on 346
sessions
History
Date
Time
Result
Not Attempted Yet
When a new chain is installed on a competitive cyclist’s bicycle, the cyclist typically experiences immediate improvement in racing performance, and then within three weeks, on average, performance reverts to the level just prior to installation of the new chain. Based on this observation, a sports-performance researcher hypothesized that installing a new component, such as a chain, gives a competitive cyclist a psychological boost, which helps motivate that cyclist during a race.
Which of the following investigations is most likely to yield information that would be useful in evaluating the researcher’s hypothesis?
(A) Determine if amateur and professional cyclists experience a similar performance boost when new chains are installed on their bicycles.
(B) Determine if the materials used to make bicycle chains vary from one manufacturer to another.
(C) Determine how often a bicycle chain must be cleaned and oiled to maintain it in new condition.
(D) Determine if a competitive cyclist can tell merely by riding a bicycle whether it has a new chain or an older chain.
(E) Determine if a new chain exerts less gear friction, which in turn requires the cyclist to exert less effort, than a used chain.
Which of the following investigations is most likely to yield information that would be useful in evaluating the researcher’s hypothesis?
(A) Determine if amateur and professional cyclists experience a similar performance boost when new chains are installed on their bicycles.
(B) Determine if the materials used to make bicycle chains vary from one manufacturer to another.
(C) Determine how often a bicycle chain must be cleaned and oiled to maintain it in new condition.
(D) Determine if a competitive cyclist can tell merely by riding a bicycle whether it has a new chain or an older chain.
(E) Determine if a new chain exerts less gear friction, which in turn requires the cyclist to exert less effort, than a used chain.
Source: Master GMAT
13 Oct 2020, 02:53
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Sajjad1994, could you please post the official explanation for this question as and when possible, it would be a big help in understanding where did I go wrong the first time when I attempted the question.
Thank you.
Thank you.
13 Oct 2020, 04:04
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kntombat
Official Explanation
Any information that helps determine the actual cause of the immediate performance boost will help evaluate the researcher’s hypothesis. Of the five avenues of investigation listed, only choice (E) will yield this type of information. If it turns out that a new chain reduces gear friction, thereby allowing the cyclist to ride just as fast but with less effort, then this fact would help disprove the researcher’s hypothesis—especially if friction increases materially during the first three weeks of use.
The correct answer is (E).
Any information that helps determine the actual cause of the immediate performance boost will help evaluate the researcher’s hypothesis. Of the five avenues of investigation listed, only choice (E) will yield this type of information. If it turns out that a new chain reduces gear friction, thereby allowing the cyclist to ride just as fast but with less effort, then this fact would help disprove the researcher’s hypothesis—especially if friction increases materially during the first three weeks of use.
The correct answer is (E).
