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. Standard deviation is a number used to tell how measurements for a group are spread out from the average (mean), or expected value. A low standard deviation means that most of the numbers are very close to the average. A high standard deviation means that the numbers are spread out.