## tana 2 years ago A local car dealership advertises cars that get the following miles per gallon:15, 22, 36, 30, 38, 21 Find the variance. (Round your answer to the nearest hundreth.)

1. sheg

first find out the average

2. tana

162

3. sheg

@tana you are required to calculate the average first

4. sheg

how you have calculated the average???

5. tana

6. sheg

average is total / number

7. tana

duhh i added them to get the "TOTAL NUMBER "

8. sheg

$Average = {{15+22+36+30+38+21 }\over{6}}$

9. sheg

so average is???

10. tana

144.5

11. sheg

$Average = {{15+22+36+30+38+21 }\over{6}}={{162}\over{6}}=27$

12. sheg

tana do u know about variance

13. sheg

Miles/Gallon Deviation Deviation^2 15 -12 144 22 -5 25 36 9 81 30 3 9 38 11 121 21 -6 36 27=average variance= 69.33333333

14. tana

no

15. sheg

is this your variance???

16. tana

idk