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.
The standard normal distribution refers to the case with mean Î¼ = 0 and standard. deviation Ï = 1. This is precisely the case covered by the tables of the normal. distribution. It is common to use the symbol Z to represent any random variable which. follows a normal distribution with Î¼ = 0 and Ï = 1. The normal distribution is often described in terms of its variance Ï2. Clearly Ï is. found as the square root of Ï2.