variance and standard deviation for 96,81,71,45,35,33,28,16,12

Question

I need see the steps

Answer 1

all em numbrs  (9 av em):.

sorted vershun:12, 16, 28,33, 35, 45, 71, 81, 96

sum=417, averaej=46.3333, biggest=96, smallest=12, raenj=84

varians=700

std deviashun=27.92848

###varians:  yu sum the squares av how much eech number differ from averaej

then varians=(sum av squares)/number av numbers

std dev=sq root(varians)

Answer 2

tiping mistake, varians=780, not 700