A law that shows that most of the numbers that are published, regardless of topic, begin with smaller numbers, and very few of them lead with larger numbers. The most common first digit is 1, the least common is 9.

Paradox

An apparent contradiction between what our intuition tells us, and what is true in reality.

Simpson's Paradox

When two sets of data are subdivided, the means for the first data set can be consistently higher than the second, but when looked at as a whole, the mean of the second set is higher than the first.