7Hacking, I. The Emergence of Probability. A Philosophical Study of Early Ideas about Probability, Induction and Statisti cal Inference [ M ]. Cambridge: Cambridge University Press, 1975.
8Bakker, A. The early history of average values and implica- tions for educatino[J]. Journal of Statistics Education, 2003, 11(1):1-24.
9Eisenhart, C. "The development of the concept of the best mean of a set of measurements from antiquity to the present day"[R]. 1971 American Statistical Association Presidential Address, unpublished manuscript, 1974.
10Bakker, A. g>- Koeno, P. E. An historical phenomenology of mean and median[J]. Educatioal Studies in Mathematics, 2006, 62(2):149 - 168.
