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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.)

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  1. sheg
    • 2 years ago
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    first find out the average

  2. tana
    • 2 years ago
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    162

  3. sheg
    • 2 years ago
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    @tana you are required to calculate the average first

  4. sheg
    • 2 years ago
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    how you have calculated the average???

  5. tana
    • 2 years ago
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    added

  6. sheg
    • 2 years ago
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    average is total / number

  7. tana
    • 2 years ago
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    duhh i added them to get the "TOTAL NUMBER "

  8. sheg
    • 2 years ago
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    \[Average = {{15+22+36+30+38+21 }\over{6}}\]

  9. sheg
    • 2 years ago
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    so average is???

  10. tana
    • 2 years ago
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    144.5

  11. sheg
    • 2 years ago
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    \[Average = {{15+22+36+30+38+21 }\over{6}}={{162}\over{6}}=27\]

  12. sheg
    • 2 years ago
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    tana do u know about variance

  13. sheg
    • 2 years ago
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    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
    • 2 years ago
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    no

  15. sheg
    • 2 years ago
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    is this your variance???

  16. tana
    • 2 years ago
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    idk

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