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.
Sigma is a statistical symbol for the standard deviation. Six sigma, therefore, pertains to six standard deviations between the mean value of a process and the customerâs specification limit. It also denotes a set of techniques used to improve business processes and minimize product defects. Letâs explore this definition in concrete terms.