When testing 
the observed value of the z-score was found to be −2.15.Then,the p-value for this test would be
Definitions:
Aggression
A range of behaviors that can result in both physical and psychological harm to oneself, others, or objects in the environment.
Arousal Level
describes the physiological and psychological state of being awake and reactive to stimuli, varying from low (unstimulated) to high (fully alert).
Darley And Latané
Psychologists known for their research on the bystander effect, highlighting how the presence of others affects an individual's likelihood to help.
Helping
The act of providing assistance or support to others, often to improve their situation or relieve distress.
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