Description

Researchers collected historical and current data on umpires to investigate their life expectancies following the collapse and death of a U.S. major league baseball umpire. They were investigating speculation that stress associated with the job posed a health risk. Data were found on 227 umpires who had died or had retired and were still living. The data set includes the dates of birth and death.

Usage

Format

A data frame with 227 observations on the following 3 variables.

Lifelength

observed lifetime for those umpires who had died by the time of the study or current age of those still living

Censored

0 for those who had died by the time of the study or 1 for those who were still living

Expected

length from actuarial life tables for individuals who were alive at the time the person first became an umpire

Source

Ramsey, F.L. and Schafer, D.W. (2002). The Statistical Sleuth: A Course in Methods of Data Analysis (2nd ed), Duxbury.

References

Cohen, R.S., Kamps, C.A., Kokoska, S., Segal E.M. and Tucker, J.B.(2000). Life Expectancy of Major League Baseball Umpires, The Physician and Sportsmedicine 28(5): 83–89.

Examples