Calculate the standard deviation. This is simply the square root of the variance. The standard deviation = √0.2564 = 0.5064. Calculate three sigma.

A job description for the next archbishop of Canterbury has stated the chosen person must be someone of the “utmost integrity”, able to speak on the issues affecting the society’s most ...

Police have released footage of an officer who “behaved aggressively and used unreasonable force” while arresting a boy, 15, to combat “misinformation”.

Net loss of Media Matrix Worldwide reported to Rs 0.20 crore in the quarter ended March 2025 as against net profit of Rs 1.70 crore during the previous quarter ended March 2024. Sales declined 3.04% ...

The square root of the variance is the standard deviation. Investopedia / Alex Dos Diaz. Understanding Variance . In statistics, variance measures variability from the average or mean.