Oh, wait, I forgot. On Slashdot, scientists are morons and people who read an article on a pop-sci site a month ago know everything, and any use of statistics can and must instantly be banished with the Words Of Power, Which I Will Not Utter Here.
Fact is that many people are very bad as statistics, including many people writing scientific papers. And yes, there are scientists who are morons.
In this case, I cannot find what percentage of elective surgery was performed on Fridays, but 4.5% was performed on Saturdays and Sundays (that was mentioned to explain why these two days were combined in the statistics). Since with random selecction of days 28% of surgery would be performed on Saturday / Sunday but in reality there is only 4.5%, this strongly
Source: http://rss.slashdot.org/~r/Slashdot/slashdotScience/~3/10RWlw_bgV4/story01.htm
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