Many people using this medication do not have serious side effects. Tell your doctor immediately if any of these unlikely but serious side effects occur: vision changes (e.g., blurred vision), eye pain, easy bruising/bleeding, mental/mood changes, swelling of ankles /feet, unusual tiredness.
Standard Deviation and Variance. Deviation just means how far from the normal. Standard Deviation. The Standard Deviation is a measure of how spread out numbers are. Its symbol is Ï (the greek letter sigma) The formula is easy: it is the square root of the Variance.
A sigma is a symbol used in statistics for a standard deviation. A standard deviation is the measure of a spread of a distribution of some quantities. For example, if you have a group of boys and measure their heights, there will be some tall boys and some short boys. There will also be some medium height boys.