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.
More than just a fleeting good or bad mood, the cycles of bipolar disorder last for days, weeks, or months. During a manic episode, a person might impulsively quit a job, charge up huge amounts on credit cards, or feel rested after sleeping two hours.ome  people think manic means really depressed.. Mania is the  'opposite' of depression. A manic depressive is someone who cycles  between being manic and depressed. The term bipolar supposedly  makes this more clear.