statistics

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Estimation is best defined as:

1. a process of inferring the values of unknown population parameters from those of known sample statistics

2. a process of inferring the values of unknown samples statistics from those of known population parameters

3. any procedure that views the parameter being estimated not as a constant, but, just like the estimator, as a random variable

4. a sampling procedure that matches each unit from population A with a “twin” from population B so that any sample observation about a unit in population A automatically yields an associated observation about a unit in population B

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