Essay
Ages of Workers The ages (in years)of three groups of workers are shown below: 
{Ages of Workers Narrative} Calculate and compare the standard deviations for the three samples.
Understand how chronic stress affects the immune system and identify which substances inhibit lymphocyte activity.
Recognize the impact of psychological factors, such as coping styles and personality, on physical health conditions like cancer.
Identify the role of adrenal glands and the substances they release under stress.
Understand various psychological interventions (e.g., relaxation training, biofeedback training, meditation) and their efficacy in treating physical symptoms or disorders.
Definitions:
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