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.
In symbols, Ï = â{ â(xi-Âµ)2 / n} where Âµ is the population mean and n is the population size. When data from a sample (of size n) is used to estimate parameters of the population, the sample standard deviation is calculated. First the deviations of data values from the sample mean are calculated.