Graph of a Probability Distribution. A probability distribution can be graphed, and sometimes this helps to show us features of the distribution that were not apparent from just reading the list of probabilities. The random variable is plotted along the x-axis, and the corresponding probability is plotted along the y-axis.
Manic-depression: Alternating moods of abnormal highs (mania) and lows (depression). Called bipolar disorder because of the swings between these opposing poles in mood. A type of depressive disease. Not nearly as prevalent as other forms of depressive disorders. Sometimes the mood switches are dramatic and rapid, but most often they are gradual.
Manic symptoms may include: 1  Anger. 2  Irritability. 3  Excessively high energy; rapid speech and thoughts. 4  Decreased need for sleep. 5  Overinflated sense of self-importance. 6  Difficulty concentrating. 7  Disturbed judgment. 8  Increased recklessness (usually involving money, drugs, alcohol, or sex)