It is quite similar to hair stroke cosmetic tattoo using the machine method, however the strokes are finer, and are not implanted as deeply in the skin. Therefore, cosmetic tattoo brows completed using microblade or microstroke technique are not as permanent.
The mean and standard deviation of a discrete population probability distribution are found by using these formulas: Mean Î¼ = Î£xP(x). Standard Deviation Ï = âÏ(x â Î¼)2P(x). To calculate these figures, we should construct a table which looks like the following: x P(x) xP(x) x - Î¼ (x â Î¼)2 (x â Î¼)2 P(x).
If we have a normally distributed variable and know the population mean (Î¼) and the standard deviation (Ï), then we can compute the probability of particular values based on this equation for the normal probability model: where Î¼ is the population mean and Ï is the population standard deviation. (Ï is a constant = 3.14159, and e is a constant = 2.71828.) Normal probabilities can be calculated using calculus or from an Excel spreadsheet (see the normal probability calculator further down the page.