Question

The "root mean square" (or r.m.s.) is a procedure that can be applied to any list of numbers, to get a sense of how big the numbers are without regard to sign. The procedure is: square the entries, then take the mean of the squares, then take the square root. Find the r.m.s. of the list -7, -7, -7, 7, 7, 7, 7, 7

Answer 1

You've got the procedure right there, do it!