Question

A sample of Geometry class final exam grades are as follows:
80, 85, 72, 76, 95
Find the variance.

Answer 1

what is variance

Answer 2

variance is the standarad deviation without the square root :)

Answer 3

o

Answer 4

mean = 81.6
variance =(8.90505)^2

Answer 5

80-81.6 = .... alot of hard work lol
85-81.6 =
72-81.6 =
76-81.6 =
95-81.6 =

Answer 6

so subtract them

Answer 7

its about 79.3

Answer 8

rounded or not

Answer 9

subtract them; square them; add them; divide by n-1 where n is the number of data points collected; and there ya go :)

Answer 10

rounded; but i dont know how your answer looks, you got options?

Answer 11

i think im gonna give up on this problem

Answer 12

1) 63.44
2) 7.96
3) 49.23
4) 6.72

Answer 13

yeah, one down aint goona hurt much ;)

Answer 14

yea

Answer 15

and those are the answers i have

Answer 16

i know how you feel these stats problems are a lot of tedious work

Answer 17

yes

Answer 18

some calculators make it a bit easier

Answer 19

yea

Answer 20

if we are doing population variance; it closer to 64

Answer 21

choose the first option :)

Answer 22

i jst guessed