Hello, I have a question: I've tried calculating the average of the numbers at the 0:30 mark, but I haven't been able to get the same answer. How were the numbers calculated to get 11.5 as the answer? Update: Nevermind, I found the answer just 5 seconds afterwards; the quadratic mean was obtained, not the arithmetic mean. This does bring up another question though; why use the quadratic mean instead of the arithmetic mean when calculating standard deviation?
Hello, I have a question: I've tried calculating the average of the numbers at the 0:30 mark, but I haven't been able to get the same answer. How were the numbers calculated to get 11.5 as the answer?
Update: Nevermind, I found the answer just 5 seconds afterwards; the quadratic mean was obtained, not the arithmetic mean.
This does bring up another question though; why use the quadratic mean instead of the arithmetic mean when calculating standard deviation?