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Related to mean: standard deviation


The expected value of a random variable. Arithmetic average of a sample.

Arithmetic Mean Average

An average calculated by adding the value of the points in a data set and dividing the sum by the number of data points. For example, suppose one wishes to calculate the average income of a country with exactly five people in it, and their incomes are $25,000, $26,000, $43,000, $70,000, and $72,000. It is calculated as:

($25,000 + $26,000 + $43,000 + $70,000 + $72,000) / 5 = $47,200.

A limitation to the arithmetic mean average is that it can be overly affected by extremes in either direction. For example, if one of the five persons in the country earns $100 billion per year, the arithmetic mean average income would be in the billions and would not accurately count the other four citizens. For this reason, many analysts use the median in conjunction with the arithmetic mean average. The arithmetic mean average is also called simply the mean.


The average of a set of numbers.Contrast with median,which is the middle figure in a set of numbers,and mode,which is the value that appears most often in a set of numbers.

Example: A survey of home values in a neighborhood of nine houses obtained the following values:

The mean, or average, is the total of all values divided by 9, or $143,044.The median is the middle number when the numbers are all arranged from highest to lowest,which would be house 5, or $139,850.The mode is $139,000,because it is the number that appears most often.

References in classic literature ?
A word such as "man" means a whole class of such collections of particulars as have proper names.
Thus there is more logical affinity between a word and what it means in the case of words of our present sort than in any other case.
It is not necessary, in order that a man should "understand" a word, that he should "know what it means," in the sense of being able to say "this word means so-and-so.
There is no more reason why a person who uses a word correctly should be able to tell what it means than there is why a planet which is moving correctly should know Kepler's laws.
It is much easier to say definitely what a word means than what an image means, since words, however they originated, have been framed in later times for the purpose of having meaning, and men have been engaged for ages in giving increased precision to the meanings of words.
At the same time, it is possible to conduct rudimentary thought by means of images, and it is important, sometimes, to check purely verbal thought by reference to what it means.
I don't know what wollen haben werden sollen sein ha"tte means, but I notice they always put it at the end of a German sentence--merely for general literary gorgeousness, I suppose.
In the first gathering of data (15 days) after the inoculation of mother spawn, treatment 2 (7x12) has the highest length of mycelia with a mean of 10.
By this means they can gain a broader understanding of themselves and of life.
000 re-samplings with a 99% confidence interval for the mean difference, [DELTA]M) were employed to accord greater reliability to the results, to correct for the non-normal distribution of the sample and the difference in group sizes and to present 99% confidence intervals for the mean differences (Haukoos & Lewis, 2005).
Sle| Used to mean something you did for as long as |you liked at weekends and something you got around to doing eventually during the mad working and partying week Now means the thing you crave most of all in |the whole wide world, more than chocolate, de"nitely more than a bit of how's-your-father and even more than shoes Sho| Used to mean something gorgeous and |impractical and worth spending a month's wages on Now means something at, that you can run |in and that you can slip on quickly, preferably without having to tie up laces or bother with buckles School run Used to mean a run before school | Now means a battle to get children fed, |dressed, packed and to school before the bell goes while "elding work calls, builders' tea requests and Husb crossly asking "Where's my.
The same pronunciation in Hebrew, usually Romanized as torah, has the basic meaning of "Law", and is often used to mean the Pentateuch, the first five books of the Bible (often referred to as "The Five Books of Moses").