(Contributor Post) A Primer on Statistical Significance — Grade Comparison, Fertilizer Selection, Dice Rolling and Tire Lifespan Evaluation and More!

Statistical significance — in a nutshell — is a way of determining if an outcome occurred by random chance, or if there was something else that caused that outcome.

For example, let’s say that a school had two teachers, each with approximately $30$ students in their class. Both classes take a standardized test, and it turns out that the average score in class A was $5\%$ better than the average in class B.  Statistical significance — in this regard — would be our way of determining whether the better score in class A was due to random chance, for instance: More