sampling error

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• sampling variation

  Sampling variation is the variation that occurs from sample to sample due to the fact that no sample is a perfect representation of the population; can be biased or unbiased; also known as sampling error.

• standard error

  Standard error is the standard deviation of a sampling distribution.

• margin of error

  Margin of error is also called critical distance; the distance between the boundaries of the "unlikely" area for a sampling distribution and the mean of that distribution expressed in the same unit as the variable (e.g., mm, lbs, dollars).

• sampling

  Sampling is the process by which we choose which objects to study.

• measurement error

  Measurement error is error caused by the natural fluctuation in most real-world measurements.