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Calculates Average/Median/Mode/Standard deviation:

* SD = standard deviation

The average (arithmetic mean) is equal to the sum of the n numbers divided by n:

*Average* = (*a*_{1}+*a*_{2}+...+*a _{n}*) /

The average of 1,2,5 is:

*Average* = (1+2+5) / 3 = 2.667

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Users write Now: Santa Klaus • 2 years ago Please explain why the subtotal is needed? Then I should, from a long example with the signs of multiplication and addition, also determine what needs to be added.

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