A member of a class of serfs in ancient Sparta, intermediate in status between slaves and citizens.
a serf or slave.
D. Samuel Gompers
While Carnegie, Ford, and Rockefeller were all tycoons of the Gilded Age, Samuel Gompers was a well known labor leader who founded the American Federation of Labor.
The value of a dependent variable depends on an independent variable, so a variable cannot be both independent and dependent at the same time. It must be either the cause or the effect, not both! ... To ensure the internal validity of an experiment, you should only change one independent variable at a time.
Shooting, castration, stabbing and drowning