并且，从三个大方向对正交试验和经典统计试验设计之间的差异性进行了比较。

Then from three general sides, the comparations of orthogonal experiment and classical statistical experiment design have been made.

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其中部分原因在于，统计数据的错误使用和蹩脚的试验设计。

Some of the reasons are due to the misuse of statistics and poor study design, but what Ioannidis and others now looking at this problem also point to are the social and political factors.

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她认为，设计一项对照试验与仅仅分析统计数据相比，将更有助于研究人员了解影响IVF成功率的因素。

She thinks that designing a controlled experiment will give researchers a better understanding of the factors affecting IVF outcome, rather than just analyzing statistics.

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