Zack Greinke: Fastball Velocity by Start
over 2 years ago
slayor
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interesting.......
However the math teacher in me will tell you that this could be categorized as a misleading graph because the y-axis scale (MPH) doesn’t begin at zero. For example, in the top graph, it appears that Zack threw a fastball velocity in start 19 that was nearly three times faster than in start 3 based on the length of the bars alone.
by Fernando Vina School of Linguistics on Jul 20, 2009 1:29 AM EDT reply actions
Oh snap, my stats prof from freshman year is a royals fan!
Seriously, the guy spent an entire class period lecturing on the evils of truncated axis on graphs. Obviously, I paid close attention.
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But
The point is to show the variation. A few mph on a fastball is a big deal. The graph does a pretty good job of showing this.
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