1 Polyps: Benign growths in the uterine lining (endometrium) can cause a heavy or prolonged period. 2  Ovary dysfunction: Lack of ovulation (anovulation) results in a lack of progesterone, causing heavy periods. 3  Adenomyosis: When glands from the uterine lining embed in uterine muscle, heavy bleeding can occur.
Mean and Variance of Random Variables. The mean of a random variable provides the long-run average of the variable, or the expected average outcome over many observations.
a variable in a mathematical equation or statement whose value depends on that taken on by the independent variable: in y = f(x), y'is the dependent variable. 2. (psychol, statistics) the variable measured by the experimenter. It is controlled by the value of the independent variable, of which it is an index.