Anna Martinez, the financial manager at the Casa Real restaurant, is checking to see if there is any

Feb 3rd, 2012
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10-33 High-low method; regression analysis. (CIMA, adapted) Anna Martinez, the financial manager at the Casa Real restaurant, is checking to see if there is any relationship between newspaper advertising and sales revenues at the restaurant. She obtains the following data for the past 10 months: Month Revenues Advertising Costs March $50,000 $2,000 April 70,000 3,000 May 55,000 1,500 June 65,000 3,500 July 55,000 1,000 August 65,000 2,000 September 45,000 1,500 October 80,000 4,000 November 55,000 2,500 December 60,000 2,500 She estimates the following regression equation: Monthly revenues = $39,502 + ($8.723 * Advertising costs) 1. Plot the relationship between advertising costs and revenues. Required 2. Draw the regression line and evaluate it using the criteria of economic plausibility, goodness of fit, and slope of the regression line. 3. Use the high-low method to compute the function, relating advertising costs and revenues. 4. Using (a) the regression equation and (b) the high-low

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