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Thread: Calculating GPA Statistics

  1. #1
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    Calculating GPA Statistics

    For all students at Walden University, the prediction equation for y = college GPA (range 0-4.0) and x1 = high school GPA (range 0-4.0) and x2 = college board score (range 200-800) is yhat = 0.11 + 0.29x1 + 0.0030x2. How much would you expect the college GPA to increase for a 0.2 increase in high school GPA, given a fixed college board score of 564?

    Anyone? Please show work and answer, I need to understand this better.

    Thanks
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  2. #2
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    Quote Originally Posted by jpd750 View Post
    For all students at Walden University, the prediction equation for y = college GPA (range 0-4.0) and x1 = high school GPA (range 0-4.0) and x2 = college board score (range 200-800) is yhat = 0.11 + 0.29x1 + 0.0030x2. How much would you expect the college GPA to increase for a 0.2 increase in high school GPA, given a fixed college board score of 564?

    Anyone? Please show work and answer, I need to understand this better.

    Thanks
    \displaystyle \frac{\partial \hat{y}}{\partial x_1}=0.29 \implies \Delta \hat{y} \approx 0.29 \Delta x_1 \implies \hat{y}=0.29(0.2)=.058
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  3. #3
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    How do you calculate the yhat though?
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