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anonymous

  • one year ago

Hi, Can someone help me with Algebra question? An equation was created for the line of best fit from actual enrollment data. It was used to predict the dance studio enrollment values shown in the table below: Enrollment Month January February March April May June Actual 12 14 14 13 16 14 Predicted 8 15 15 12 17 15 Residual 4 −1 −1 1 −1 −1 Analyze the data. Determine whether the equation that produced the predicted values represents a good line of best fit.

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  1. amistre64
    • one year ago
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    how does your material cover this?

  2. anonymous
    • one year ago
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    What do you mean? I don't understand your question.

  3. amistre64
    • one year ago
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    you are taking a course i assume, it has material that covers the contents of that course ... when you read the material, how did it present a solution process.

  4. amistre64
    • one year ago
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    im just not sure how your course defines "a good line of best fit"

  5. anonymous
    • one year ago
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    Well for this particular question I looked back in my chapters lesson on analyzing data and I couldn't find a question particularly worded like this. Thats why Im confused. Im not exactly sure how to answer this.

  6. anonymous
    • one year ago
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    I can give you the answer choices?

  7. amistre64
    • one year ago
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    answer choices might be helpful ...

  8. amistre64
    • one year ago
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    as far as residual analysis goes ... this is a fairly good link http://stattrek.com/regression/residual-analysis.aspx

  9. anonymous
    • one year ago
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    A. No, the equation is not a good fit because the sum of the residuals is a large number. B. No, the equation is not a good fit because the residuals are all far from zero. C. Yes, the equation is a good fit because the residuals are all far from zero. D. Yes, the equation is a good fit because the sum of the residuals is a small number.

  10. anonymous
    • one year ago
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    Sorry I had to type all of them.

  11. anonymous
    • one year ago
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    I think its A. But Im not positive

  12. amistre64
    • one year ago
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    the sum of the residuals is 1, and the mean is 1/6 B is of no consequence to me, and C is just a rewording of B so I would say it is between A and D, all depends on how the material you have defines "large/small number"

  13. amistre64
    • one year ago
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    how "good" of a best fit it is? ... i dont think i have ever covered that tho. which is why i defered to your material for more context

  14. anonymous
    • one year ago
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    I think Im going to go with A

  15. anonymous
    • one year ago
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    Thankyou for your help

  16. amistre64
    • one year ago
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    my best guess would be A as well, but i just cant verify it

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