Old Posted: 5/14/2015 11:14:33 AM   #1
Join Date: 10/9/2003 6:36:15 PM

Default  Page 37

In the last sentence of the second to last paragraph, it should say "the incidence" not "prevalence" as follows: "Thus, in this example, the negative control experiment strengthens the argument that any change in the incidence of cancer in the coffee group is due to the coffee and not to other factors."
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