(Redirected from Weighted mean) In colloquial language, an average is the sum of a list of numbers divided by the number of numbers in the list. In mathematics and statistics, this would be called the arithmetic mean. In statistics, mean, median, and mode are all known as measures of central tendency.
Definition of cat'sâeye for English Language Learners. : 1  a jewel that has a pale stripe running down its middle which makes it look like the eye of a cat. : 2  a marble with round circles that look like eyes.
A cat's pupil is an elliptically-shaped opening in the iris that allows light to pass to the retina. It dilates or constricts according to the amount of light that enters Frisky's eyes. If she's in a dim room with little light, her pupils will be large in order to take in more light for improved vision. cat's pupil is an elliptically-shaped opening in the iris that allows light to pass to the retina. It dilates or constricts according to the amount of light that enters Frisky's eyes. If she's in a dim room with little light, her pupils will be large in order to take in more light for improved vision.