Posted by **treshia** on Tuesday, March 22, 2011 at 4:17am.

Suppose that these 15 measurements are respectively labeled x1,x2,..,x15. (Thus,-27 is labeled x1,62 is labeled x2,and so on.)

Find. 15 over the sum sign and i=1 under the sum sign(x1 + 43)

I ahve no idea how to solve this becaue I never seen this type of math before. Someone please help me!

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