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"Penile length in the flaccid and erect states: guidelines for penile augmentation". Denniston, Frederick Mansfield Hodges 2001• Archived from on 26 April 2012. "A sample that is not representative of the population to which generalizations are to be made. Department of Surgery, School of Medicine and Allied Medical Sciences, Imam Reza Hospital, Ardabil University of Medical Sciences. 1994 Corrective Procedure for Penile Shortening Due to Peyronie's Disease. Men's and women's views on penis size across the lifespan". Journal of Research in Urology. Bodywatching: a field guide to the human species, By , 1985, p. "Penile size and the 'small penis syndrome'". Mayo Clinic Staff 2009 Peyronie's disease. "Predicting penile size during erection". "Penis size: Survey of female perceptions of sexual satisfaction". Wylie KR, Eardley I June 2007. FOR EXAMPLE, a group of band students would not be representative of all students at the middle school, and thus would constitute a biased sample if the intent was to generalize to all middle school students. Archived from on 1 July 2006. Lever, Janet; Frederick, David A.。

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