Herman Otto Hartley, Date of Birth, Date of Death

Herman Otto Hartley

German-American statistician

Date of Birth: 13-Apr-1912

Date of Death: 01-Jan-1980

Profession: mathematician, university teacher, statistician

Nationality: United States

Zodiac Sign: Aries

H.
O.
Hartley (1912–1980), born Herman Otto Hirschfeld but commonly called HOH, was a German-American statistician.
He developed Hartley's test for equality of variances (published in 1950).
In 1953 he was elected as a Fellow of the American Statistical Association.
In 1967 he and J.N.K.
Rao published a maximum likelihood method for finding variance components in mixed models.
He made significant contributions in mathematical programming, optimization, and survey sampling.
He also founded Texas A&M University's Department of Statistics.
He earned his Ph.D.
in mathematics from Berlin University in 1934, and in statistics, from the University of Cambridge in 1940.