To solve this problem, we need to find the expression given by:
11∑(i=1) xi/29
Let's break down the steps to solve it:
Step 1: Calculate the sum of all the measurements xi.
Add up all the given measurements:
72 + 28 + 56 - 47 - 36 - 41 + 21 - 31 - 56 + 41 - 54 = -27
Step 2: Divide the sum by 29.
-27/29 = -0.9310 (rounded to four decimal places)
Step 3: Multiply the result by 11.
-0.9310 * 11 = -10.241 (rounded to three decimal places)
Therefore, the value of the expression is -10.241 (rounded to three decimal places).