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The following is the results of a regression analysis of vehicle fuel efficiency (MPG) and vehicle weight (in thousands of pounds)
Dependent variable is: MPG
R-squared = 75.6%
s = 2.413 with 50-2 = 48 df
a) Create a 95% confidence interval for the slope of the regression line and explain what the interval means
b) Create a 95% confidence interval for the average fuel efficiency among cars weighing 2,500 pounds and explain what the interval means
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