Question: 28. Refer to the data in exercise 2. The estimated regression equation for those data is y 5 218.4 1 2.01x1 1 4.74x2 a. Develop

28. Refer to the data in exercise 2. The estimated regression equation for those data is yˆ 5 218.4 1 2.01x1 1 4.74x2

a. Develop a 95% confidence interval for the mean value of y when x1 = 47 and x2 = 10.

b. Develop a 95% prediction interval for y when x1 = 47 and x2 = 10.

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