Christine collected data about the weight (in thousand kg) and fuel efficiency (in km per L) of a random sample of 32 car models. Here is computer output from a least-squares regression analysis on her sample:
Predictor Coef SE Coef T P
Constant 15.84 0.8 19.9 0.00 Weight -5 0.52 -9.6 0.00
S 1.294 R-sq 75.28%
Assume that all conditions for inference have been met
Which of these is a 99% confidence interval for the slope of the least squares regression line?
A. -5± 2.457(0.52/√32)
B. -5± 2.576(0.52/√32)
C. -5=2.457(0.52)
D. -5=2.576(0.52)
E. -5=2.75(0.52)