### Defining statistics terms: Sampling error, estimators, central limit theorem, standard error

Define (a) parameter, (b) estimator, (c) sampling error, and (d) sampling distribution. Explain the difference between sampling error and bias. Can they be controlled? Name three estimators. Which ones are unbiased? Explain what it means to say an estimator is (a) unbiased, (b) efficient, and (c) consistent. State th