At the end they are given a stiff three-hour exam (sample question: Describe briefly the process followed in cleaning and sterilizing syrup lines and syrup tanks).

此后他们要接受长达三小时的严格的考试(题目举例：简述给糖浆管道和糖浆存储罐进行清洗和消毒的流程)。

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The second question to ask is whether the sample is representative? See what I mean?

第二个要问的问题是，样本是否有代表性？明白我的意思吗？

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To answer this question, consider a related question: If you were to obtain another sample of Nova Scotia beer drinkers, would you expect to see exactly the same results?

要回答这个问题，请考虑一个相关的问题：如果您要获得另一个新斯科舍省啤酒消费者的样本，您希望看到完全相同的结果吗？

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Sample test question: would you ever leave 6 children under the age of 12 unattended?

FORBES: Confessions of the Best Nanny in the World

Many doctors question their validity, starting with the sample size.

FORBES: Why Rating Your Doctor Is Bad For Your Health

Mr Close's case was one of two that have come to light recently where the offenders in question were gay men who said they were compelled to provide a sample because of convictions under a law that was repealed a decade ago.

BBC: A DNA autoradiogram