Refer to the Revenue and Pro t data set below. Data are in billions of dollars.
(a) Use Mega-Stat or MINITAB to find confidence and prediction intervals for Y using the following set of x values: 1.8, 15, and 30.
(b) Report the 95 percent confidence interval and prediction interval for x = 15.
(c) Calculate the 95 percent confidence interval for μy using the appropriate method from Chapter 8.
(d) Compare the result from part (c) to the confidence interval you reported in part (b). How are they different?

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Revenue and Profit of Entertainment Companies (n = 9) Entertainment Revenue (X) Profit (Y) 1.792 8.931 2.446 1.883 2.490 43.877 1.311 26.585 27.061 -0.020 1.146 -0.978 -0.162 0.185 2.639 0.155 1.417 1.267