What is the difference between an estimator and an estimate? A. An estimate is a function of a sample of data to be drawn randomly from a population whereas an estimator is the numerical value of the estimator when it is actually computed using data from a specific sample. B. Both an estimator and an estimate are functions of a sample of data to be drawn randomly from a population. C. An estimator is a function of a sample of data to be drawn randomly from a population whereas an estimate is the numerical value of the estimator when it is actually computed using data from a specific sample. D. Both an estimator and an estimate are numerical values computed using data from a specific sample. Determine whether the following are examples of estimators, estimates or neither. A. The sample average is 3.3 . B. The mean value of random variable Y in a population. C. The sample average is X. D. The variance of random variable Z in a population. E. The sample variance is X