Sigma - Sigma Definition & Meaning

I have had many instances where 20mm fits the bill perfectly when 24mm is too narrow and 18mm too wide.

The sorority adopted this fund as its official philanthropy in 1954.

One standard deviation, or one sigma, plotted above or below the average value on that normal distribution curve, would define a region that includes 68 percent of all the data points.

Sigma Sigma Sigma is a member of the NPC , an umbrella organization encompassing 26 national sororities or women's fraternities, which focus on service, education, scholarship programming and social activities.