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tana

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.)

  • one year ago
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  1. sheg
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    first find out the average

    • one year ago
  2. tana
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    162

    • one year ago
  3. sheg
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    @tana you are required to calculate the average first

    • one year ago
  4. sheg
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    how you have calculated the average???

    • one year ago
  5. tana
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    added

    • one year ago
  6. sheg
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    average is total / number

    • one year ago
  7. tana
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    duhh i added them to get the "TOTAL NUMBER "

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

    • one year ago
  9. sheg
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    so average is???

    • one year ago
  10. tana
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    144.5

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

    • one year ago
  12. sheg
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    tana do u know about variance

    • one year ago
  13. sheg
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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

    • one year ago
  14. tana
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    no

    • one year ago
  15. sheg
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    is this your variance???

    • one year ago
  16. tana
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    idk

    • one year ago
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