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Charles Clayton monitors the daily performance of his investment portfolio by recording a "+" or a "-" sign to indicate whether the portfolio's value increased or decreased from the previous day.His record for the last eighteen business days is "- + + - - - + - - + + + + + + + + -".The number of runs in this sample is _________.
Dopamine Neurons
Neurons that produce and release dopamine, a neurotransmitter that plays a key role in reward, motivation, memory, attention, and even regulating body movements.
Role Models
Individuals whose behavior, example, or success is or can be emulated by others, especially by younger people.
Smoking
The act of inhaling and exhaling the smoke of burned substances, most commonly tobacco, which is associated with a range of health risks including respiratory diseases and cancer.
Stressful
Characterized by or causing mental, emotional, or physical strain or tension.
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