The SPOT-Light test can measure how many HER2 genes are present in a sample of breast tumor; the more genes there are, the more likely the tumor will respond to treatment with Herceptin.

SPOT - Light检测可计算出一个乳腺癌样本中存在多少her 2基因；这种基因越多，用赫赛汀治疗肿瘤就越有效。

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The sample size of a treatment is the number of people who received that treatment.

一个处理水平的样本量为接受这个处理水平来访者的数量。

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The larger the sample size the more certain you are that the sample’s performance reflects the real performance of the treatment.

样本量越大，你越能肯定样本的表现反应了此处理水平真正的表现。

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The 5% sample was too small to allow a detailed analysis of the treatment patterns of distinct urology groups.

WSJ: How The Wall Street Journal Crunched the Medicare Numbers