Dirt bikes 2014, part 3.

Here’s another model for the MSRP of off-road motorcycles.

Response variable is: MSRP R squared = 88.9% R squared (adjusted) = 88.6%

s = 828.3 with 112 - 4 = 108 degrees of freedom Variable Coefficient SE(Coeff) t-ratio P-value Intercept -9561.50 716.8 -13.3 60.0001 Bore 79.9424 7.498 10.7 60.0001 Weight -17.8908 3.110 -5.75 60.0001 Wheel Base 260.399 20.31 12.8 60.0001

a) Would this be a good model to use to predict the price of an off-road motorcycle if you knew its bore, clearance, and engine strokes? Explain.

b) The Honda CRF450X has an MSRP of $8440, a wheel base of 58.3, and a bore of 96.

Can you use this model to estimate its Weight? Explain.