Weight (in tons) and fuel economy (in miles/gallon) were measured for a sample of seven diesel trucks. The results are presented below. Weight, a Mileage, y 8.00 7.69 24.5 4.97 27.00 4.56 14.5 6.49 4.34 6.24 4.45 28.5 12.75 21.25 (a) Given the data provided, find the coefficients for the fitted regression line ŷ = Bo + B₁x. (b) Write down an estimate for the error variance o². (c) Give a 95% confidence interval for E[y|x = 14] = 0+1461.

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