Research analyzing the results from a national representative sample of 3,009 people who have taken the Myers Briggs test shows that introverts actually outnumber extroverts, 50.8% to 49.3%.

根据全国代表性对进行Myers Briggs测试了的3009人的调查结果表明内向的人数（50.8%）其实超过了外向的人数（49.3%）。

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The teens were a subset of participants in the National Longitudinal Survey of Youth, a representative sample of American adolescents.

这些青少年是全美青少年纵贯调查协会(the Natiaonal Longitudinal Survey of Youth)的会员，是典型美国青少年的代表。

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It seems that the majority of health claims made, in a large representative sample of UK national newspapers, are supported only by the weakest possible forms of evidence.

看来，英国全国性报纸中具有代表性的大部分健康主张，所能支持它们的证据的都是由最弱的形式存在着。

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The same order of top three finishers in the straw poll were the same order as the top three finishers in the national poll, and so to those skeptics who were concerned about the accuracy of the straw poll, the national poll provided empirical evidence that it was a pretty good representative sample of what's going on.

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The new analysis, which appears in the June issue of the journal Pediatrics, included a nationally representative sample of 3, 383 adolescents who participated in the National Health and Nutrition Examination Survey, a biannual survey conducted by the CDC.

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