https://openlibrary.org/books/OL784355M.opds Statistical techniques in business and economics 2022-12-05T02:02:58Z Robert Deward Mason https://openlibrary.org/authors/OL229142A/Robert_Deward_Mason Irwin Chicago 1996 xix, 871 p. : 9th ed. Includes bibliographical references and index. "Key formulas" [4 p.] inserted. eng https://openlibrary.org/books/OL784355M https://archive.org/details/statisticalte9thedmaso urn:ISBN:0256139016 urn:ISBN:0256189048 95016497