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Interpret Multiple Regression Coefficients A) Increasing the Price of the Sony Bravia by $100

Question 2

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Interpret multiple regression coefficients.
-What affects flat panel LCD TV sales? Flat panel LCD TV's are sold through a
Variety of outlets. Sales figures (number of units) for the popular Sony Bravia were
Obtained for last quarter from a sample of 30 different stores. Also collected were data
On the selling price and amount spent on advertising the Sony Bravia (as a percentage of
Total advertising expenditure in the previous quarter) at each store. Based on the results
Shown below, the correct interpretation of the regression coefficient for Price is  Dependent Variable is Sales  Predictor  Coef  SE Coef  T  P  Constant 90.1925.083.600.001 Price 0.030550.010053.040.005 Advertising 3.09260.36808.400.000\begin{array}{l}\text { Dependent Variable is Sales }\\\begin{array} { l r r r r } \text { Predictor } & \text { Coef } & \text { SE Coef } & \text { T } & \text { P } \\\text { Constant } & 90.19 & 25.08 & 3.60 & 0.001 \\\text { Price } & - 0.03055 & 0.01005 & - 3.04 & 0.005 \\\text { Advertising } & 3.0926 & 0.3680 & 8.40 & 0.000\end{array}\end{array}


A) Increasing the price of the Sony Bravia by $100 will result in at least 3 fewer TV's sold.
B) For a given amount spent on advertising, a $100 increase in price of the Sony Bravia is associated with a decrease in sales of 3.055 units, on average.
C) Holding the amount spent on advertising constant, an increase of $100 in the price of the Sony Bravia will decrease sales by 3.055 units.
D) Holding the amount spent on advertising constant, an increase of $100 in the price of the Sony Bravia will decrease sales by .03%.
E) None of the above.

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