View Single Post

  #75 (permalink)  
Old 29-06-2009, 02:46 PM
Paul mabbott's Avatar
Paul mabbott Paul mabbott is offline
Knight Commander of the Wild Empire
 
Join Date: Oct 2005
Location: Sheffield, FPRSY
Posts: 7,652
Re: Bad science ....

Quote:
Originally Posted by pressld2 View Post
......... No study has ever "disproved" a link between MMR and autism. Numerous studies have failed to find a link but that is emphatically NOT the same as disproving a link.
..........
Dave P.
Sorry, let's get back to this 'disproving' business.
It is impossible to disprove a negative - although the proposition may be so unlikely as to be ignored anyway.
However, most scientific analysis will start off by testing the null hypothesis. i.e. can we demonstrate/detect a difference between two sets of results/individuals/whatever which have been treated differently. If the two sets do not differ then the null hypothesis has not been disproved - not the same as saying that it has been proved but, in effect, showing that there is nothing to test/investigate further.

"Although it is not true that all conservatives are stupid,
it is true that most stupid people are conservative."
John Stuart Mill
__________________
Ladybird Survey
Reply With Quote