File:Risk difference.jpg

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	16:06, 19 May 2011		197 × 76 (3 KB)	Hannah861 (talk \| contribs)	{{Information \|Description =Risk difference formula \|Source =Microsoft Word \|Author =Hannah Holt \|Date = \|Permission = \|other_versions = }}

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