Beals, Ralph E. Statistics for economists an introduction [by] Ralph E. Beals. - Chicago Rand McNally [1972] - xi, 420 p. illus. 24 cm. - Rand McNally economic series . LCCN: 79184061 Subjects--Topical Terms: StatisticsRegression analysis LC Class. No.: HA29 / .B3835 Dewey Class. No.: 519.5