Comment Re:You know who can't do math? (Score 1) 566
If you are sick on a Friday or Monday...
I frequently hear this argument, but it presupposes a truly "random" sick day. I suspect that the dates are indeed biased, with more people being "sick" on a Monday or Friday. I know that would certainly be my choice.
Somewhat related, it's like flipping a coin 999 times and coming up heads each time. What is the probability that it will come up heads again? If it was truly random, the probability would be 50%. More likely, however, the coin is weighted on one side and biased toward heads. Bias is definitely a factor.