Evelyn dropped a tiny spot of ketchup on her pants during lunch time. Even though her teacher was able to totally remove the spot, Evelyn is crying hysterically and she wants to go home because she feels that her outfit is ruined. This behavior is an exam

The procedure used to help ensure that the experimental and control groups do not differ in any way that might affect the results of an experiment is called:

A) variable controlling. B) random assignment. C) representative sampling. D) stratification.

Leisure activities are any activities that are done outside of work

Indicate whether the statement is true or false.