Old Hollywood: Lewis sensationally revealed in her 1994 memoir that she was conceived in 1935 when Loretta Young, 22, and the married Clark Gable, 34, were shooting The Call of the Wild. Secret: Loretta Young is pictured with Judy Lewis in 1944, who did not know for years who her father was.
The sigma symbol provides the character used to denote the sum of an equation in mathematics. You can create a sigma sign by accessing the Character Palette, using a keyboard shortcut or by using the Special Characters menu in your current application.
The symbol they use for standard deviation is the lower-case Greek letter sigma . For any process with a standard distribution (something that looks like a bell-shaped curve), the probability is 68.26%. that the next value will be within one standard deviation from the mean. The probability is 95.44% that the same next. value will fall within two standard deviations. The probability is 99.73% that it will be within three sigma; and 99.994%.