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gabbyalicorn

  • one year ago

A music shop has 5 different brands of guitar strings. The 5 different brands sell for $16, $20, $15, $11, and $13. What is the mean absolute deviation of the prices? Round to the nearest cent, if necessary. @data_LG2

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  1. gabbyalicorn
    • one year ago
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    The mean is 19. Now I need help with the rest.

  2. gabbyalicorn
    • one year ago
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    @LegendarySadist

  3. anonymous
    • one year ago
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    Do you know the formula for MAD? Here it is how it looks like: |dw:1434479283962:dw| It will be a long process... Steps: 1. You already find the mean :) 2. Get the difference of the mean from each value 3. Get the sum of each differences 4. Then divide it by the number of the data set.

  4. gabbyalicorn
    • one year ago
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    so difference = subtracting right? but what do i subtract it (19) with?

  5. anonymous
    • one year ago
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    wait, for the mean are you sure you'll get 19?

  6. gabbyalicorn
    • one year ago
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    yeppers. :)

  7. anonymous
    • one year ago
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    what is 16+20+15+11+13 ?

  8. gabbyalicorn
    • one year ago
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    oh, i got 15

  9. anonymous
    • one year ago
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    yep :) Now we got the same thing. Step number two: \(\sf x-x_{mean}\) For example, you have x= 16 and xmean is 15, so 16-15 is 1. Do this for x=20, x= 15, x=11 and x=13 and tell me what you get :)

  10. gabbyalicorn
    • one year ago
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    20 - 15= 5 11- 13= 2

  11. anonymous
    • one year ago
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    hmm.. given data-mean so it will be like 16-15 = 1 20-15 = ? 15-15= ? 11-15 =? 13-15 = ?

  12. gabbyalicorn
    • one year ago
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    oh, i see sorry

  13. anonymous
    • one year ago
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    no worries :)

  14. gabbyalicorn
    • one year ago
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    20-15 = 5 15-15= 0 11-15 = 4 13-15 = 2

  15. anonymous
    • one year ago
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    right, since we are getting the absolute values, we'll ignore the negative differences:) So far we have the differences: 1, 5, 0, 4, 2 now let's move to step 3:|dw:1434479892954:dw| Add the values you get from step 2 :)

  16. gabbyalicorn
    • one year ago
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    11

  17. anonymous
    • one year ago
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    you forgot to add the difference of 16-15 :)

  18. gabbyalicorn
    • one year ago
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    oh 12

  19. anonymous
    • one year ago
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    yes! now let's go one with the final step. Divide that sum to the number of given data set, which is 5.. so 12/5 is?

  20. gabbyalicorn
    • one year ago
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    2.4

  21. anonymous
    • one year ago
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    bingo ;)

  22. gabbyalicorn
    • one year ago
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    :D

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