John Van Ryzin
The New York Times

March 11, 1987, Wednesday, Late City Final Edition

John Van Ryzin, Chairman Of Columbia Statistics Dept.

SECTION: Section B; Page 8, Column 6; Metropolitan Desk

LENGTH: 162 words

John Van Ryzin, chairman of the department of statistics at Columbia University and a senior mathematician at the Brookhaven National Laboratory in Upton, L.I., died Friday of acquired immune deficiency syndrome, at the Presbyterian Hospital. He was 51 years old and lived in Manhattan. 

Dr. Van Ryzin had taught biostatistics and statistics at Columbia since 1980 and became chairman in 1985. He was an authority on medical statistics and survival analysis, and the adverse effects of radiation and toxicity. He was a member of the science review panel of the Environmental Protection Agency.

Dr. Van Ryzin was the co-author, with Herbert Robbins, of ''An Introduction to Statistics.''

He is survived by a daughter, Jeanne, of Austin, Tex.; three sons, Gregg and Garrett, both of Manhattan, and Christopher, of Sterling, Alaska; a sister, Joanne Yanny of Burlington, Wis., and three brothers, Robert, of Madison, N.J., Gerald, of Milwaukee, and Joel, of Chicago.

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