MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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- The owner of Showtime Movie Theaters, Inc., would like to predict weekly gross revenue as a function of advertising expenditures. Historical data for a sample of eight weeks follow. Weekly Gross Revenue ($1,000s) 96 90 ŷ = 95 92 95 94 94 94 Television Newspaper Advertising Advertising ($1,000s) ($1,000s) 5.0 2.0 4.0 2.5 3.0 3.5 2.5 3.0 1.5 2.0 1.5 2.5 3.3 2.3 4.2 2.5 (a) Develop an estimated regression equation with the amount of television advertising as the independent variable. (Round your numerical values to two decimal places. Let X₁ amount of television advertising in $1,000s and y represent the weekly gross revenue in $1,000s.) ŷ = represent the (b) Develop an estimated regression equation with both television advertising and newspaper advertising as the independent variables. (Round your numerical values to two decimal places. Let x₁ represent the amount of television advertising in $1,000s, x₂ represent the amount of newspaper advertising in $1,000s, and y represent the weekly…arrow_forwardUsing your favorite statistics software package, you generate a scatter plot with a regression equation and correlation coefficient. The regression equation is reported asy=−72.84x+79.07y=-72.84x+79.07and the r=−0.832r=-0.832.What proportion of the variation in y can be explained by the variation in the values of x?r² = %arrow_forward10arrow_forward
- You generate a scatter plot using Excel. You then have Excel plot the trend line and report the equation and the r value. The regression equation is reported as 2. y = – 69.87 + 54.78 and the r 0.3721. What is the correlation coefficient for this data set? r =arrow_forwardUsing your favorite statistics software package, you generate a scatter plot with a regression equation and correlation coefficient. The regression equation is reported as and the r = -0.4. y=-60.93x + 87.44 What percentage of the variation in y can be explained by the variation in the values of x? r² = % (Report exact answer, and do not enter the % sign)arrow_forwarda) Determine a linear regression equation for the data. Round the slope and y-intercept to the nearest whole number. b) Find the correlation coefficient, r-value, of the line. Round your answer to the nearest thousandth. c) Predict the distance the driver would have traveled after 11 hours. Round your answer to the nearest whole number.arrow_forward
- You generate a scatter plot using Excel. You then have Excel plot the trend line and report the equation and the p2 value. The regression equation is reported as 27.84 + - 74.89x and the r2 = 0.2209. What is the correlation coefficient for this data set? r =arrow_forwardFind the regression equation, letting the first variable be the predictor (x) variable. Using the listed lemon/crash data, where lemon imports are in metric tons and the fatality rates are per 100,000 people, find the best predicted crash fatality rate for a year in which there are 525 metric tons of lemon imports. Is the prediction worthwhile? Lemon Imports Crash Fatality Rate 235 264 540 D 360 15.5 485 16 15.7 15.4 15 Find the equation of the regression line. (Round the constant three decimal places as needed. Round the coefficient to six decimal places as needed.)arrow_forwardIf an estimated regression line has a slope of 16, an intercept of 4, and the mean of the input variable is 8, then the mean of the response variable is: a. 64b. 8c. 132d. 48can you please explain the answer.arrow_forward
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