Find the standard deviation for the set of data. {5,4, 18, 14, 22, 20, 6, 16, 12}
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Check the picture below.
so hmmm let's get the whole area of the rectangle, and then <u>get the areas of those 3 triangles and subtract their area from that of the rectangle's,</u> what's leftover is what we didn't subtract, namely, the white triangle.
