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Which of the following additional experimental data would

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Which of the following additional experimental data would [#permalink] New post 23 Oct 2005, 22:11
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*5. Which of the following additional experimental data would support the hypothesis that classical music is beneficial to the development of newborn?
(A) The neonates in a nursery where no music was played fared better than those in nursery B.
(B) Nursery A contained 15 percent more premature babies than nursery B.
(C) The newborns in nursery A cried less, suffered fewer minor ailments, and gained more weight than did newborns in a nursery with no music.
(D) The music played in nursery A was louder than that played in nursery B.
(E) The ratio of nurses to newborns in nursery B was 1 to 4; in nursery A, it was 1 to 6.
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 [#permalink] New post 24 Oct 2005, 01:13
please include the stem...i think its missing
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 [#permalink] New post 24 Oct 2005, 07:29
Stem is as follow ----

In an experiment, two different types of recorded music were played for neonates in adjacent nurseries in a hospital. In nursery A, classical music was played; in nursery B, rock music was played. After two weeks, it was found that the babies in nursery A cried less, suffered fewer minor ailments, and gained more weight than did the babies in nursery B.
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 [#permalink] New post 24 Oct 2005, 11:43
C is correct.

The stem draws a comparison between babies listening to classical music and babies listening to rock music, but the comparison that needs to be made to test the hypothesis is one between babies listening to classical music and babies in a control group that are not listening to any music at all. C draws this comparison and notes the advantages of those babies listening to classical music.

A does nothing to indicate the effect of classical music.

B talks about premature babies, which adds another variable and makes it harder to measure any advantages of classical music.

D is outside the scope. Volume of music is not addressed as having any effect on babies development.

E once again compares babies in nursery A to those in nursery B.
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 [#permalink] New post 24 Oct 2005, 12:32
I will pick B.

one possibility for gaining more weight in nursurey A can be attributed to having more mature babies in nursery A. option B eliminates that possibility and pushes it further by mentioning that it has more premature baby.

This additional information helps conclude the hypothesis.
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 [#permalink] New post 24 Oct 2005, 12:33
C for me as well.

E and D are irrelevant. A and B would weaken the argument. Therefore C is the only correct answer.
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 [#permalink] New post 24 Oct 2005, 12:46
Quote:
I will pick B.

one possibility for gaining more weight in nursurey A can be attributed to having more mature babies in nursery A. option B eliminates that possibility and pushes it further by mentioning that it has more premature baby.

This additional information helps conclude the hypothesis.


Let's reread B:

Quote:
(B) Nursery A contained 15 percent more premature babies than nursery B.


B does two things that hurt its chances at being the correct answer. First of all, the comparison is still to babies that listen to rock music, not to babies who listen to no music at all. Second, the fact that the babies are premature introduces an additional variable to the question. Are premature babies more likely to see these changes than babies born at full-term? That question adds confusion to and weakens the hypothesis.

Last edited by BumblebeeMan on 24 Oct 2005, 13:18, edited 1 time in total.
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 [#permalink] New post 24 Oct 2005, 13:05
OA is C and is correctly explained in one of the messages
  [#permalink] 24 Oct 2005, 13:05
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