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When a population is not normally distributed, the Central Limit Theorem states that a sufficiently large sample will result in the sample mean being normally distributed.
Retirement
The act of leaving one's job and ceasing to work, typically due to age.
Mental Health
A state of well-being in which an individual realizes his or her own abilities, can cope with the normal stresses of life, can work productively, and is able to make a contribution to their community.
Depression
A psychological condition marked by a consistently low mood or a lack of enthusiasm for activities, significantly disrupting everyday functioning.
Dementia
A broad category of brain diseases that cause a long-term and often gradual decrease in the ability to think and remember, significantly affecting daily functioning.
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