Question

what is the standard deviation for the numbers 9,10,10,8,7,11,12,9

Answer 1

find the mean
then subtract the mean from each other numbers

Answer 2

then square each one

Answer 3

add all those numbers up
then divide that number by how many values their are
then square that answer then tada

Answer 4

Assuming this is a sample:
\[ \large s=\sqrt{\frac{1}{n-1}\sum_{i=1}^n(x_i-\bar{x})^2}\]

Answer 5

u wanna do it that way u can

Answer 6

hmm i think i did something wrong with my calculations. I'm confused now

Answer 7

it tells me to round to two decimal places