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(c) Use the data to develop an estimated regression equation with both television advertising and newspaper advertising as the independent variables. Let x₁ represent the amount of television advertising. Let x2 represent the amount of newspaper advertising. If required, round your answers to three decimal places. For subtractive or negative numbers use a minus sign even if there is a + sign before the blank. (Example: -300) 9- X1 Test whether each of the regression parameters Bo, B1, and B2 is equal to zero at a 0.05 level of significance. We - Select your answer conclude that Bo= 0. We Select your answer- conclude that B1 -0. We - Select your answer conclude that 82 = 0. What are the correct interpretations of the estimated regression parameters? Are these interpretations reasonable? (1) Bo is the estimate of change in the weekly gross revenue if newspaper advertising is held constant and there is a $100 increase in television advertising. By is the estimate of change in the weekly gross revenue if television advertising is held constant and there is a $100 increase in newspaper advertising. B2 is the estimate of the weekly gross revenue when television and newspaper advertising are both zero. The interpretation of Blo. P1, and 2 are all reasonable. (1) Bo is the estimate of the weekly gross revenue when television and newspaper advertising are both zero. B1 is the estimate of change in the weekly gross revenue if newspaper advertising is held constant and there is a $100 increase in television advertising. Az is the estimate of change in the weekly gross revenue if television advertising is held constant and there is a $100 Increase in newspaper advertising. The interpretation of Bo is not reasonable but the interpretations of 81 and By are reasonable. (ill) Bo is the estimate of the weekly gross revenue when television and newspaper advertising are both zero. B1 is the estimate of change in the weekly gross revenue if television advertising is held constant and there is a $100 increase in newspaper advertising. 52 is the estimate of change in the weekly gross revenue if newspaper advertising is held constant and there is a $100 increase in television advertising. The interpretation of fo is not reasonable but the interpretations of B1 and 2 are reasonable. - Select your answer - (d) How much of the variation in the sample values of weekly gross revenue does the model in part (c) explain? If required, round your answer to two decimal places. %
(e) Given the results in part (a) and part (c), what should your next step be? Explain. The input in the box below will not be graded, but may be reviewed and considered by your instructor. blank (f) What are the managerial implications of these results? Management can feel confident that increased spending on The results also suggest that Select your answer- generating revenue. advertising results in increased weekly gross revenue. Select your answer advertising in Select your answer - advertising may be slightly more effective than