The following is a list of 13 measurements: -38,-89,-47,-43,-70,59,92,97,23,-11,-62,-22,-5. Suppose that these measurements are respectively labeled X1,X2,...,X13 Find the sum when i=1 Xi/30.

Answer 1

Suppose that these 10 measurements are respectively labeled x1 x2 ---x10. (Thus, -61 , is labeled x1 -61 is labeled x2, and so on.)
Find 33x-1 .