Consider a generic statistical model where the parameter of interest is the popu- lation mean 0, and the population variance is a finite number. Give the definition of a consistent estimator for 0,...

Extracted text: Consider a generic statistical model where the parameter of interest is the popu- lation mean 0, and the population variance is a finite number. Give the definition of a consistent estimator for 0, and prove that the sample mean estimator is al- ways consistent for 0. The answer should not exceed more than 20 lines, including 4. equations.