Difference between revisions of "Average"

Revision as of 23:59, May 13, 2007

Average is the sum of a group of numbers divided by the number of numbers it the group. For example, the average of 3, 5, and 7 is <math>15 \div 3=5</math>.

Another term for average is the mean.

@@ Line 1: / Line 1: @@
-'''Average''' is a term in mathematics used to measure the 'central tendency' or 'expected value' of a data set; in conversational terms, it would be expected to be a value somewhere in the middle of the data.
+'''Average''' is the sum of a group of numbers divided by the number of numbers it the group.  For example, the average of 3, 5, and 7 is <math>15 \div 3=5</math>.
-There are various [[descriptive statistics]] that can be chosen as a measurement of the this central tendency, such as the [[mode]], the [[median]] and the [[mean]], this latter coming in a variety of forms: [[harmonic mean]], [[geometric mean]] and '''arithmetic mean'''. The '''arithmetic mean''' is the most common type of mean, and it is the one that most people would generally take as the '''average'''.
+Another term for average is the [[mean]].
-Thus one way of defining the '''average''' of a set of data would be:
-* the sum of all the values divided by the number of items in the data set.
-Please see the table of mathematical symbols for explanations of the symbols used.
-==Example of calculation==
- To calculate the average of 3, 5, and 7
- The total of the data is ,math> 3 + 5 + 7 = 15 </math>
- There are 3 items in the data set.
- So the '''average''' is <math>15 \div 3=5</math>.

Difference between revisions of "Average"

Revision as of 23:59, May 13, 2007

Navigation menu

Search