Final answer:
The T-Test does not cover a physical distance but measures the statistical significance between means or data points.
Step-by-step explanation:
The T-test is a statistical test used to compare the means of two groups or to compare a sample mean to a known value. The distance covered upon completion of the T-Test does not refer to a physical distance, but rather to the conceptual 'distance' between data points or means in terms of statistical significance. In this context, to cover distance would mean gathering sufficient evidence to either accept or reject a hypothesis, such as determining if the average training time of marathon runners is significantly different from a given value, like 15 years, based on a sample mean and standard deviation.