Question: Refer to the data in exercise 2. The estimated regression equation for those data is y-bar = 1 8.4 + 2.01x1 + 4.74x2 a.

Refer to the data in exercise 2. The estimated regression equation for those data is
y-bar = – 1 8.4 + 2.01x1 + 4.74x2
a. Develop a 95% confidence interval for the mean value of y when x1 = 45 and x2 = 15.
b. Develop a 95% prediction interval for y when x1 = 45 and x2 = 15.

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