s is the sample standard deviation. it is computed by taking the square root of:
sum(x-mean)2/n-1
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The symbol for the set of integers is Z. This comes from the German Zahl, which means integer.
It is a solution.
The symbol that means 'results in' is the equals sign. It is one of the most common and recognizable mathematical symbols.
The Factorial symbol is the exclamation point. (!) This symbol means to multiply a row of natural descending numbers.
x2