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Math Help - Determining Point Estimate.

  1. #1
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    Question Determining Point Estimate.

    Residuals:
    Min 1Q Median 3Q Max
    -1.9848 -0.7523 -0.2647 0.5996 2.7807
    Coefficients:
    Estimate Std. Error t value Pr(>|t|)
    (Intercept) -5.067694 6.710096 -0.755 0.479
    x1 0.483138 0.384743 1.256 0.256
    x2 0.015507 0.009309 1.666 0.147
    x3 -0.133613 0.275758 -0.485 0.645
    Residual standard error: 1.661 on 6 degrees of freedom
    Multiple R-squared: 0.3941, Adjusted R-squared: 0.09113
    F-statistic: 1.301 on 3 and 6 DF, p-value: 0.3575

    Therefore: the residual standard error is too low (at 1.661) for B1 to be anything other than zero.

    If you were going to use the model above to estimate a GPA given that x1 = 6, x2 = 600, and x3 = 2, what would your point estimate be?
    Last edited by mr fantastic; March 18th 2011 at 02:35 PM. Reason: Title.
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  2. #2
    MHF Contributor matheagle's Avatar
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    It looks like all the X's are worthless in estimating Y.
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