A company wants to study the effect of an employee's length of employment on their number of workdays absent. The company collected the following information on a random sample of seven employees. 
What is the independent variable (X)?
Definitions:
Advance Directive
Legal documents that allow individuals to outline their preferences for medical care if they are unable to make decisions for themselves in the future.
Ethical Committee
A group tasked with reviewing and providing guidance on ethical issues in a particular context, such as medical research or corporate decision-making.
Extraordinary Resuscitation
An intensive medical rescue effort to revive someone from a state of apparent death or unconsciousness.
Feminist Ethics
An approach to ethics that prioritizes the experiences and perspectives of women and seeks to address gender inequalities and injustices.
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