What is Sampling Variation?
What is Sampling Variation? Introduction In this blog post, I want to pay attention to the concept of sampling variation. In my econometrics classes, I have often found that students have a hard time wrapping their heads around this concept, especially in the case of regression analysis. Some of the questions I often get range from “why is our estimate of (\beta) uncertain, since we have obtained it in a deterministic way from our data sample” to “where do (t) statistics come from?