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.
Some commonly used symbols for sample statistics are given below: the sample mean x Â¯ {\displaystyle {\bar {x}}} , the sample variance s2, the sample standard deviation s, the sample correlation coefficient r, the sample cumulants kr.