Interpret Regression Output $= - 0.48 + 7.42 \mathrm { GPA }$

question 13

Multiple Choice

Interpret regression output.
-A sales manager was interested in determining if there is a relationship between
College GPA and sales performance among salespeople hired within the last year. A
Sample of recently hired salespeople was selected the number of units each sold last
Month recorded. Based on the regression results shown below, the percentage of
Variability in sales performance (units sold per month) accounted for by college GPA is The regression equation is
Units Sold $= - 0.48 + 7.42 \mathrm { GPA }$
$\begin{array} { l r r r r } \text { Predictor } & \text { Coef } & \text { SE Coef } & \text { T } & \text { P } \\ \text { Constant } & - 0.484 & 3.256 & - 0.15 & 0.884 \\ \text { GPA } & 7.423 & 1.044 & 7.11 & 0.000 \end{array}$
$$S = 1.57429 \quad \mathrm { R } - \mathrm { Sq } = 78.3 \% \quad \mathrm { R } - \mathrm { Sq } ( \operatorname { adj } ) = 76.8 \%$$

• A) 50.56%.
• B) 78.3%.
• C) 34.70%.
• D) 100%
• E) None of the above.

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