# mean

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Related to mean: standard deviation

## mean

[mēn]an average; a number that in some sense represents the central value of a set of numbers.

## mean

(mēn),A statistical measurement of central tendency or average of a set of values, usually assumed to be the arithmetic mean unless otherwise specified.

[M.E.,

*mene*fr. O.Fr., fr. L.*medianus*, in the middle]## mean

(mēn) an average; a numerical value that in some sense represents the central value of a set of numbers.**arithmetic mean**the sum of

*n*numbers divided by

*n.*

**geometric mean**the

*n*th root of the product of

*n*numbers.

## mean

Etymology: ME,

*mene,*in the middleoccupying a position midway between two extremes of a set of values or data. The arithmetic mean is a value that is derived by dividing the total of a set of values by the number of items in the set. The geometric mean is a value between the first and last of a set of values organized in a geometric progression. Compare median, mode.

## mean

Statisticsnoun The sum of the values of all observations or data points divided by the number of observations; an arithmetical average; the central tendency of a collection of numbers, which is a sum of the numbers divided by the amount of numbers the collection.

Types

• Population mean (µ).

• Sample mean (x-bar).

Vox populi-UK

adjective Stingy; miserly; unwilling to share.

Vox populi-US

adjective Unkind, spiteful.

## mean

Statistics The sum of values divided by number of values. See Arithmetric mean, Geometric mean, Weighted mean.## mean

(mēn)A statistical measurement of central tendency or average of a set of values, usually assumed to be the arithmetic mean unless otherwise specified.

[M.E.,

*mene*fr. O.Fr., fr. L.*medianus*, in the middle]## mean

see ARITHMETIC MEAN.## mean

measure of central tendency; average value (i.e. sum of all values divided by number in sample); mean, median and mode are identical in normally distributed data## mean

(mēn)Statistical measurement of central tendency or average of a set of values, usually assumed to be arithmetic mean.

[M.E.,

*mene*fr. O.Fr., fr. L.*medianus*, in the middle]## mean (x),

*n*a measure of central tendency that is the calculated arithmetic average of a series of scores.

**mean**(x) corpuscular hemoglobin,

*n*a measure of the weight of hemoglobin in a single red blood cell. The value is obtained by multiplying the hemoglobin value by 10 and dividing by the number of red blood cells. The normal range is between 27 and 31.

**mean**(x) corpuscular hemoglobin concentration (MCHC),

*n*a measure of red blood cells useful in identifying the type of anemia. The MCHC is obtained by multiplying the value of hemoglobin by 100 and dividing by the value of the hematocrit. The normal range is between 31.5 and 35.5.

**mean**(x) corpuscular volume (MCV),

*n*indicates the size of the red blood cells. The MCV is obtained by multiplying the hematocrit value by 10 and dividing by the number of red blood cells. The normal range is between 82 and 98.

**mean**(x) life,

*n*See average life.

## mean

an average; a numerical value intermediate between two extremes. Called also arithmetic mean.

**mean arterial pressure**

average pressure in artery for one heartbeat.

**mean cell constants**

see erythrocyte indices.

**mean corpuscular hemoglobin (MCH)**

see mch.

**mean corpuscular hemoglobin concentration (MCHC)**

see mchc.

**mean corpuscular volume (MCV)**

see mcv.

**mean deviation**

the average value of a set of absolute deviations from the mean of a set of observations.

**mean electrical axis (MEA)**

in electrocardiography, a calculation based on the relative amplitude of Q, R and S waves in the three bipolar limb leads. It is an aid to recognizing right ventricular enlargement and various intraventricular conduction defects.

**geometric mean**

the antilog of the mean of the logarithm of the calculated values, the same as the n

^{th}root of the product of the values. It is often a more useful mean for growth curves.**harmonic mean**

the reciprocal of the arithmetic mean of values converted to their reciprocals (used in dealing with skewed data).

**rolling mean**

see moving average.

## Patient discussion about mean

**Q. I mean what this fitness is all about…..** I know nutritious diet is important for good health but why is the need for fitness …..I mean what this fitness is all about…..

**A.**Fitness can help you live longer and has been proven to help the body, muscles, bones not age as much as if you were inactive...

**Q. why do you call Bipolar ... Bipolar? i mean what does it mean? **

**A.**Bipolar disorder is called this way because it is charecterized by two types of obvious mood disorders- depression on the one side, and mania, or hypomania (a manic state, or 'high'), on the other side.

**Q. Does ascites mean it's the end?** My mother, age 65 was diagnosed with ovarian cancer in a routine US examination. It was also diagnosed she already has mild ascites. Does that mean her cancer is metastatic?

**A.**Ascites can render the staging of the cancer as metastatic, but it depends on the specific characters of the ascites, so further testing is needed here.