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Gathering information about an entire population often costs too much or is virtually impossible . Instead , we use a sample of the population . A sample should have the same characteristics as the population it is representing . Most statisticians use various methods of random sampling in an attempt to achieve this goal . This section will describe a few of the most common methods .
Please check all the words that can be used instead of the target word in the same context. Note that the morphology of the target (third person singular, past tense etc.) is considered to be applied to the candidate automatically in the process of paraphrasing.