Gre写作是美国所有作文考试中时刻最长而质量要求最高的一类作文考试，而在短期内提高gre写作能力不是一天两天可以完成额，所以我们在备考2011新gre写作时必然要对问题问题深切的剖析，体味以下优异范文的文章结构，以提高新gre写作的整体分数。
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breakfast to all its students the district would reduce tardiness and absenteeism as well as
improve the overall academic performance of its students. To support this conclusion the
superintendent points out that during a 6-month trial program involving 100 students ranging in
age from 5 to 12, these students were less likely to be tardy or absent than other students. The
superintendent also cites the well-known fact that eating healthful breakfasts on a regular
basis improves academic performance. The superintendent's argument is problematic in
several respects, rendering the argument unconvincing as it stands.
The argument's chief problem is that it relies on numerous unsubstantiated assumptions
about the 6-month study. One such assumption is that the participants' regular and punctual
attendance was attributable to the fact that breakfasts were provided. Yet logic and common
sense inform me that the results might have been due instead to one or more other factors.
Perhaps these particular students were compelled to show up punctually and regularly for
some other reason. Perhaps the 100 participants were comparatively reliable and disciplined
children who are less likely in any event to be late for school. Or perhaps the participants are
relatively healthy and therefore less likely to be absent from school than the average student.
Moreover, it is uncertain whether the program's participants even ate the breakfasts that the
trial program provided. In short, without considering and ruling out alternative explanations for
the study's results, the superintendent cannot justifiably conclude that the results are due to
the fact that breakfasts were provided to participating students.
Even if the participants' punctual and regular attendance was due to the breakfasts provided
to them, the statistical reliability of the trial program's results is questionable. The number of
participants, 100, might constitute an insufficiently small sample to draw any reliable
conclusions about how district students 5-12 years of age would behave under similar
conditions---as a group. The larger this group compared to the sample of 100 participants, the
less reliable the study's results. Also, the sample might be unrepresentative of district students
as a group. For example, perhaps the 100 participants happened to be children who eat small
dinners and are therefore hungry for breakfast. 感谢您阅读《GRE作文范文大全（103） 》一文，出国留学网(liuxue86.com)编辑部希望本文能帮助到您。