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题库 / GMATLA-GI-4
The graph to the left shows the results of a survey of Asian Americans and their perspective on life in America. Respondents who replied "Don't know" are not included in the chart. Note the lifestyle aspect of Strength of family ties provides an outlier data point relative to other lifestyle categories.
A) The average (arithmetic mean) of the percentage of respondents that said a particular lifestyle aspect was better in their country of origin waspercentage points higher with the inclusion of the skewed outlier data point than it was without the inclusion of the skewed outlier data point.
B) On average, the number of respondents who did not respond for each of the lifestyle categories was
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An outlier is "a data point on a graph or in a set of results that is very much bigger or smaller than the next nearest data point."。此处是最后一项结果偏离最大，且是skewed偏离（负向偏离）。排除掉这个选项之后，其他6项中认为他们祖国比美国好的平均人数是17.28，算上这个选项的平均值是10.83，两者差额是6.4。这里其实问的是，排除掉一个明显偏离的选项前后，平均数的变化。
skewed outlier data point 偏离的异常数据
“Skewed outlier data point” 不单是极值，它特指那些 异常值，并且它们对数据分布造成了 偏斜影响。可以理解为“引起偏态分布的极端离群点”。
outlier 排除明显偏离项之后再算平均值，类似于：去掉最高分和最低分后取均值
这道题有人知道什么意思吗
这个有解释： http://www.gmatpill.com/gmat-practice-test/gmat-integrated-reasoning/graphics_interpretation-questions/gmat-prep/Asian+Perspective+on+US+Lifestyle/question/1822。 有个Julz完整的回答了。
An outlier is "a data point on a graph or in a set of results that is very much bigger or smaller than the next nearest data point."
所以第一题问的是 *所有*回答原来国家比美国好的人的比例 与 （*不包括*回答strenth of family ties的）回答原来国家比美国好的人的比例 的差异。
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