Journal of Hygiene

Research Article

The standard error of an estimate of expectation of life, with special reference to expectation of tumourless life in experiments with mice

J. O. Irwina1

a1 Statistical Research Unit, Medical Research Council

An expectation of life limited to n years is properly defined by

S0022172400014443_eqn1

to which the approximation usually used is

S0022172400014443_eqn2

(Received February 23 1949)

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