DESIGN: a random control experiment.

设计：随机对照实验。

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Methods: Random control was conducted.

方法：采用随机对照。

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DESIGN: Random control study based on patients.

设计：以患者为研究对象的随机对照研究。

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The titles, which will return to Amazon under Random House's control, include some of the most important works of 20th century American fiction by such writers as John Updike and Ralph Ellison.

WSJ: Amazon Loses E-Book Deal

Then they used regression analysis to see if being in a possession of a gun made you more likely to be shot when compared to a control group of random Philadelphia residents.

FORBES: A Useless Study on Gun Possession

Of course, whether you publish yourself or through the traditional channels, selling enough to become a millionaire is still dependent on something completely outside of your control the often random taste of the reading public.

FORBES: Who Wants To Be A (Kindle) Millionaire?