And statistical controls are unlikely to compensate for a poor sampling strategy that does not yield a sample representative of the population to which we want to generalize.

一个差劲的采样策略并不能产生一个我们需要的代表总体的样本，而统计管理不太可能弥补这一点。

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Although random sampling used for many surveys fails to cover large segments of the population, the procedure nonetheless offers insight into voting and consumption patterns.

虽然许多调查所用的随机取样不能覆盖大部分人口，但是这一过程使人们能更深刻地理解选举和消费的模式。

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Any discrepancies between the observed and expected frequencies can be accounted for as expected sampling variability from the same population of Nova Scotia beer drinkers.

观察频率和期望频率之间的任何差异都可以解释为新斯科舍省相同啤酒消费者的期望抽样可变性。

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