Why do my daily earnings fluctuate so much?

[indodpendo]

The crazy thing is with my site is somedays i wont mak no money with AdSense there will be like 5 clicks for $0

then another day i would see lik e 15 click for $12 ill wake up and be like wow thats alot of money and be really shocked because the day befor ill get nothing.
Anyone know why or how this is happening

[PatrickDeese]

Invalid clicks filtering, geotargeting, the value of ads on different pages is varied.

When you have a tiny amount of traffic your statistics are going to vary wildly.

[diamondgrl]

Basic law of statistics.

[ownerrim]

I put it up there with other mysteries like the yetti and crop circles.