Find the standard deviation of 21, 31, 26, 24, 28, 26

Given the dataset

We start by computing the average:

We compute the difference bewteen each element and the average:

We square those differences:

And take the average of those squared differences: we sum them

And we divide by the number of elements:

Finally, we take the square root of this quantity and we have the standard deviation:

x=6 and x=3

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positive

step-by-step explanation:

the quadrant is facing upwards