At a large university students have either a final exam or a final paper at the end of a course. The table below lists the distribution of the number of final exams that students at the university will take, and their associated probabilities. What are the mean and standard deviation of this distribution? 
Definitions:
Disintegrate
To break down or fall apart, either physically or structurally, often resulting in loss of coherence or unity.
Source Traits
Are foundational personality characteristics from which surface traits are derived, serving as the building blocks of an individual's personality.
Surface Traits
Characteristics or qualities of an individual that are observable and can be easily identified by others.
Personality Basis
The underlying elements or factors that form an individual's distinctive character and behavioral patterns.
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