An equation for the random walk model is given by the equation: 
, where 
is the change in the time series from time t to time t - 1, 
is a constant, and 
is a random variable (noise) with mean 0 and some standard deviation 
.
Definitions:
Smoking Rates
The proportion of individuals in a population who smoke cigarettes or use tobacco products.
Coping Strategy
Techniques or methods used by individuals to handle and endure stressful situations in an effective manner.
Social Support
The assistance and comfort received from friends, family, and others, crucial for physical and psychological health.
Quit Smoking
The process of discontinuing tobacco smoking, which can improve health outcomes and decrease risk of smoking-related diseases.
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