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# The av. math score on a state-wide proficiency exam for

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Director
Joined: 20 Sep 2006
Posts: 653

Kudos [?]: 132 [0], given: 7

The av. math score on a state-wide proficiency exam for [#permalink]

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12 Aug 2008, 06:48
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The av. math score on a state-wide proficiency exam for students attending X high school last yr was 20 points higher then the av math score for students attending nearby Y high school. Therefore, any student at Y high school wishing to achieve a better math score on next september's proficiency exam should transfer to X high school over summer.

which of the following statement, if true, would most significantly strenghten the conclusion drawn in passage above?

a) X high school offers its student a unique, week-long course just before they take the proficiency exam that has consistently proven effective in raising student scores.

b) one third of all the students who transfered to X high school the before taking the test got scores that are at least 20 points higher than the average score at Y hihg school

c) in past 5 yrs, the av score at Y high school has been rising at a faster rate than thas av score at X high school.

Kudos [?]: 132 [0], given: 7

Manager
Joined: 25 May 2008
Posts: 187

Kudos [?]: 9 [0], given: 0

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12 Aug 2008, 07:18
I think is A. In B says that only one third of transfered students obtained a better score, and C weaken the conclusion

Kudos [?]: 9 [0], given: 0

Senior Manager
Joined: 14 Mar 2007
Posts: 296

Kudos [?]: 32 [0], given: 3

Location: Hungary

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12 Aug 2008, 07:19
Where are D and E answer choises? Out of these choises A seems to be my favourite.

Kudos [?]: 32 [0], given: 3

Senior Manager
Joined: 07 Jul 2005
Posts: 402

Kudos [?]: 61 [0], given: 0

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12 Aug 2008, 13:15
A provides support that test-takers will improve their score before they write their tests.
B is a statistic
C weakens

Kudos [?]: 61 [0], given: 0

SVP
Joined: 28 Dec 2005
Posts: 1549

Kudos [?]: 173 [0], given: 2

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12 Aug 2008, 17:51
Out of the three choices, A is the best.

Kudos [?]: 173 [0], given: 2

Re: CR -- strengthen   [#permalink] 12 Aug 2008, 17:51
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