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in statistics, summation denoted by upper case sigma, is used to find the sum of a series of observation in a particular variable.

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Q: In statistics what is summation?
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What is the main purpose of descriptive statistics?

Descriptive statistics is the branch of statistics concerned with the collection, organization, summation and presentation of data.


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Generally, progressive summation is the process of obtaining a cumulative sum at any time by adding together all prior occurrences.


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