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Proportions, probability and other matters

A study to investigate students' facility with proportions has been undertaken by the author and Fay Sharples of the University of Waikato in New Zealand over the period 1989 to 1992. the initial study was done during 1989 and 1990 and 64 students at the University of Waikato and 57 at Brunel University in the UK took part, Some results of this study have been reported elsewhere (Jolliffe and Sharples, 1991; Jolliffw and Sharples, 1993).