(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.
In-depth Information on Cats with a Red Eye 1  â. It is important to differentiate whether the engorged blood vessels that cause an eye to appear red are superficial or deep. 2  Red eye due to conjunctivitis is relatively common and does not require emergency treatment.