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The expected value of a random variable. Arithmetic average of a sample.
Copyright © 2012, Campbell R. Harvey. All Rights Reserved.

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.
Farlex Financial Dictionary. © 2012 Farlex, Inc. All Rights Reserved


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.

The Complete Real Estate Encyclopedia by Denise L. Evans, JD & O. William Evans, JD. Copyright © 2007 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Heart rate (HR) and mean arterial pressures (MAP) were recorded before the administration of the study drug at baseline (T-0), 3 minutes after study drug administration(T-1), immediately after tracheal intubation (T-2) and then after every 1 minute upto 5 minutes (T3-7) and after 10 minutes of intubation (T-8).
For the analysis of continuously measured blood pressure using the FINAPRES we referred to mean arterial pressure. Due to errors of measurement, data of only 63 participants could be analyzed.
For both groups mean arterial pressure (MAP) and mean heart rate were recorded at baseline 0 (before oxytocin infusion), 1, 3, 5, 10, 15 minute (after oxytocin infusion) and values at 0, 1, 3, 5, 10, 15 minutes was compared between both the groups.
In septic shock, several small randomized control trials support the use of methylene blue, suggesting improved hemodynamics through increase in mean arterial pressure and systemic vascular resistance but no mortality benefit, likely a factor of the small sample sizes [5].
We found that smoking, systolic pressure, diastolic pressure, mean arterial pressure and the proportion of internal arteriovenous fistula were significantly higher in the PH group than in the non-PH group.
Arterial stiffness parameters including mean arterial pressure (MAP), pulse pressure (PP), PWV (m/s), and augmentation index (AI) are directly proportional to the risk of MACE [8-10].
After the bolus of magnesium, mean heart rate was higher and mean arterial pressure was lower in the magnesium group than in the placebo group.
It is likely that aortic regurgitation, even though mild, greatly contributed to the pressurisation of the left heart, so LV end-diastolic pressure rapidly equalised with mean arterial pressure, with minimal further flow into or out of the left heart, explaining why AV remained open during diastole.
After adjustment for age, sex, race, mean arterial pressure by mercury sphygmomanometry, and lipids, patients with type 1 diabetes had a significantly thicker internal cIMT, compared with controls (mean, 0.56 mm vs.
The following hemodynamic parameters were estimated: heart rate (HR), mean arterial pressure (MAP), cardiac index (CI), stroke index (SI) and total peripheral resistance (TPR).
Patency and stenosis rate following surgery were not significantly different between three groups (p<0.05) At postoperative 2nd month, mean arterial pressure, both the velocity and flow volumes at systolic and diastolic phases, in the venous grafts of the remaining 25 subjects were measured.