Besse Beulah Day (later known as Besse Day Mauss, 1889–1986) was an American statistician known for her contributions to the statistics of forestry and naval engineering, and in particular for pioneering the use of design of experiments in engineering.
In 1960 she and her husband, contractor Charles E. Mauss, bought a house on South Carolina Avenue in Washington, DC, where they lived until retiring in 1969 to New Oxford, Pennsylvania.
She died on September 14, 1986, in New Oxford.
Day became a Fellow of the American Statistical Association in 1951 for being "diligent in the applications of statistical theory to the two widely separated fields of forestry and engineering". In 1958, she was elected to the Washington Academy of Sciences "in recognition of her pioneer work in the statistical design of experiments in many fields particularly those of forestry and engineering and for her unique achievements in the exposition of statistical methods". She was also a fellow of the American Society for Quality Control.[D53]
Day, Besse B. (1949), "Application of statistical methods to research and development in engineering", Review of the International Statistical Institute, 17 (3/4): 129, doi:10.2307/1400864
Day, Besse B. (October 1949), "The statistical part in welding investigations", American Welding Society Journal, 28 (10): 449s–461s
Day, Besse B. (May 1953), "The use of statistics in planning laboratory and fleet test work", Journal of the American Society for Naval Engineers, Wiley, 65 (2): 339–352, doi:10.1111/j.1559-3584.1953.tb05858.x. See in particular the author biography, p. 339.