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David, R. Anderson, J. Sweeney Dennis, A. Williams Thomas, D. Camm Jeffrey, J. Cochran James, J. Fry Michael, et W. Ohlmann Jeffrey. Statistics for Business & Economics (14th Edition). Cengage Learning, Inc, 2023.

David, R. Anderson, et al. Statistics for Business & Economics (14th Edition). Cengage Learning, Inc, 2023.