Data Were Collected on Monthly Sales Revenues (In $\$ 1,000 \mathrm {~s}$

question 4

Multiple Choice

Data were collected on monthly sales revenues (in $\$ 1,000 \mathrm {~s}$ ) and monthly advertising expenditures $( \$ 100 \mathrm {~s} )$ for a sample of drug stores. The regression line relating revenues $( \mathrm { Y } )$ to advertising expenditure $( \mathrm { X } )$ is estimated to be $\hat { y } = - 48.3 + 9.00 x$ . The correct interpretation of the slope is that for each additional

• A) \(\$ 1\) spent on advertising, predicted sales revenue increases by \(\$ 9,000\).
• B) \(\$ 100\) spent on advertising, predicted sales revenue increases by \(\$ 9,000\).
• C) \(\$ 100\) spent on advertising, predicted sales revenue decreases by \(\$ 9,000\).
• D) \(\$ 1,000\) in sales revenue, advertising expenditures decrease by \(\$ 48.30\).
• E) \(\$ 100\) in sales revenue, advertising expenditures decrease by \(\$ 48.30\).

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