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It is the sum of all of the numbers, divided by the number of numbers. For example, what is the arithmetic mean of this set of numbers: 8, 6, 4, 2 ? Add up the numbers: 8+6+4+2=20. The number of numbers is 4; so divide 20 by 4 to get 5, which is the arithmetic mean.

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Q: What is the definition of arithmetic mean?
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What is the definition of an arithmetic mean?

The arithmetic mean is an average arrived at by adding all the terms together and then dividing by the number of terms.


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The quadratic mean is a measure of the spread of values about their arithmetic mean. By definition, the arithmetic mean of the differences will be zero and so adds no information. Another measure is required and that is the quadratic mean.


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The arithmetic mean is a weighted mean where each observation is given the same weight.


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The arithmetic mean of a single number, such as 1784298281, is the number itself.


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