Tampons, on the other hand, can block your flow, which can make your period last longer. 5. Many women arenât keen to have sex on their period, but, the truth of the matter is, it can help shorten the length of your period. Sex can effect flow because of orgasmic contractions.
The standard deviation of a random variable, statistical population, data set, or probability distribution is the square root of its variance. It is algebraically simpler, though in practice less robust, than the average absolute deviation.he variance is the mean of these values: and the population standard deviation is equal to the square root of the variance: This formula is valid only if the eight values with which we began form the complete population.
standard deviation. a measure of the dispersal of a random variable; the square root of the average squared deviation from the mean. For data that have a normal distribution about 68% of the data points fall within one standard deviation from the mean and 95% fall within two standard deviations. Symbol is Ï.tandard deviation. n. Symbol Ï. A statistic used as a measure of the dispersion or variation in a distribution, equal to the square root of the arithmetic mean of the squares of the deviations from the arithmetic mean.