Create a 95 confidence interval for the slope of the

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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)

Vehicle Count Mean StdDev
MPG 50 25.0200 4.83394
wt/1000 50 2.88780 0.511656

Dependent variable is: MPG

R-squared = 75.6%

s = 2.413 with 50-2 = 48 df

Variable Coefficient SE(Coeff) t-ratio p-value
Intercept 48.7393 1.976 24.7 less than or equal to 0.0001
Weight -8.21362 0.6738 -12.2 less than or equal to 0.0001

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

Reference no: EM13637767

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