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anonymous

  • one year ago

The number of toys owned by eight classmates is shown below: 4, 3, 4, 5, 6, 6, 8, 4 Part A: What is the mean of the data? Show your work. (4 points) Part B: Use your answer from Part A to calculate the mean absolute deviation for the data. Show your work. (6 points)

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  1. welshfella
    • one year ago
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    Par A the mean is the sum of the 8 numbers divided by 8.

  2. anonymous
    • one year ago
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    so five

  3. anonymous
    • one year ago
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    i need help on part b

  4. welshfella
    • one year ago
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    yes

  5. welshfella
    • one year ago
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    Give me a second on that one. My memory is a bit hazy on that so i need to check something.

  6. anonymous
    • one year ago
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    ok

  7. welshfella
    • one year ago
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    you take each value and find the difference between it and the mean. for example the first value 4 the difference is mean-4 = 5-4 = 1

  8. anonymous
    • one year ago
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    i dont get that

  9. welshfella
    • one year ago
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    Do that with each value (in a table if you like) and add these computed differences up Divide the result by 8 and you have the mean absolute deviation.

  10. welshfella
    • one year ago
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    |dw:1438622310370:dw|

  11. anonymous
    • one year ago
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    can you help me that

  12. anonymous
    • one year ago
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    so i have to divide 8 by 5 4 and 1

  13. welshfella
    • one year ago
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    |dw:1438622377903:dw|

  14. welshfella
    • one year ago
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    get the idea?

  15. anonymous
    • one year ago
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    no

  16. anonymous
    • one year ago
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    |dw:1438622579346:dw|

  17. anonymous
    • one year ago
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    i dont get that

  18. welshfella
    • one year ago
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    you are subtracting each of the 8 numbers from the mean (which is 5) or if the number is greater than 5 you subtract 5 from the number.

  19. anonymous
    • one year ago
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    so 10

  20. welshfella
    • one year ago
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    |dw:1438622689861:dw|

  21. anonymous
    • one year ago
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    ok 10

  22. welshfella
    • one year ago
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    yes 10 is correct

  23. welshfella
    • one year ago
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    now divide 10 by 8 and you have the mean absolute deviation.

  24. anonymous
    • one year ago
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    1.25

  25. welshfella
    • one year ago
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    correct

  26. welshfella
    • one year ago
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    it gives a measure of the spread of the numbers around the mean.

  27. anonymous
    • one year ago
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    ok can you help me with another one

  28. welshfella
    • one year ago
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    I'll have to come back in a bit

  29. anonymous
    • one year ago
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    so no

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