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Math Help - reading a regression coefficient

  1. #1
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    reading a regression coefficient

    Having done a linear regression on two variables: one for student reading test scores (ranging from about 300 to 600) and one for teacher experience (in years).

    I obtained the result that the regression coefficient is 0.62 where reading test scores are the dependent variable and teacher experience is the independent variable. The R^2 score is 0.0127.

    I think this means that student test scores go up 0.62 points for each year of experience a teacher has.

    We have been asked to choose from the following four choices in interpreting the data: I think the answer is 1) because the teacher's experience is measured in years and the test scores are measured in points.

    1) A one year increase in teacher experience increases the expected reading test score by 0.62 points.

    2) A one percent increase in the teacher's experience increases the expected reading test score by 0.62 percent.

    3) A one percent increase in teacher experience increases the expected arithmetic test score by 0.62 points.

    4) A one year increase in teacher experience increases the expected arithmetic test score by 0.62 percent
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  2. #2
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    Re: reading a regression coefficient

    Hey kingsolomonsgrave.

    You are correct with your answer, but I would tcaution you that with an R^2 value like the one you have, the model is going to be pretty much useless.
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