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.
1. something that is likely to vary; something that is subject to variation. 2. a quantity that can assume any of a set of values. 3. a star that varies noticeably in brightness. 4. a symbol (like x or y) that is used in mathematical or logical expressions to represent a variable quantity. Familiarity information: VARIABLE used as a noun is uncommon.