C. R. Rao

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**C. R. Rao**
Calyampudi Radhakrishna Rao
Born	September 10, 1920 Hadagali, Karnataka, India
Residence	India , UK , USA
Nationality	Indian- American
Field	Mathematician
Institution	Indian Statistical Institute Cambridge University Penn State University
Alma Mater	Andhra University Calcutta University Cambridge University
Academic Advisor	Ronald Fisher
Notable Students	Debabrata Basu S. R. S. Varadhan
Known for	Cramér-Rao inequality Rao-Blackwell theorem
Notable Prizes	Mahalanobis medal National Medal of Science
Religion	Hindu

Calyampudi Radhakrishna Rao (born September 10, 1920) is a famous Indian statistician and currently professor emeritus at Penn State University. He was born in Hadagali, Karnataka state, India.

He received an M.S. in mathematics from Andhra University and an M.S. in Statistics from Calcutta University in 1943.

Rao worked at the Indian Statistical Institute and the Anthropological Museum in Cambridge before acquiring a Ph.D. at King's College under R.A. Fisher in 1948, to which he added a Sc.D. also from Cambridge in 1965.

Among his best known discoveries are the Cramér-Rao inequality and the Rao-Blackwell theorem both related to the quality of estimators. Other areas he worked in include multivariate analysis, estimation and differential geometry.

Dr. Rao is a Wilks and Mahalanobis medalist; a member of eight National Academies in India, the United Kingdom, the United States, and Italy; he has received dozens of medals, citations, awards, and other honors for his contributions to statistics and science. Dr. Rao was awarded the United States National Medal of Science, that nation's highest award for lifetime achievement in fields of scientific research, in June 2002.