This symbol (called Sigma) means "sum up". I love Sigma, it is fun to use, and can do many clever things. So Σ means to sum things up. |
Summation notation (or sigma notation) allows us to write a long sum in a single expression. |
Sigma notation is a method used to write out a long sum in a concise way. In this unit we look at ways of using sigma notation, and establish some useful rules. |
In mathematics, summation is the addition of a sequence of numbers, called addends or summands; the result is their sum or total. |
The sigma notation, ∑, is followed by an expression which represents the pattern of a "sequence" of terms. Below and above the ∑symbol will be the starting ... |
Sigma notation is used extensively in statistics. For example, suppose we weigh five children. We will denote their weights by x1, x2, x3, x4 and x5. |
Sigma notation (which is also known as summation notation) is the easiest way of writing a smaller or longer sum using the sigma symbol ∑, the general ... |
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