In major league baseball, pitchers usually throw four pitches. Three of these are the typical fastball, the ordinary slider, and the conventional knuckleball. The fourth kind of pitch? It’s the familiar kind that starts low to the left, then gradually goes up, and finally drifts downward slowly to the right.
What’s the name of this fourth kind of pitch?
It’s called the normal curve!
(NOTE: This little effort at statistical humor comes from S. Huck)