https://docs.google.com/spreadsheets/d/18pubMDUiO4Nvz9k0MHm7P4yt_4g3PXay3Ojlgr51i9k/edit?usp=sharing

a)(2 points) Is there sufficient evidence that the overall model is useful for predicting the operating costs per revenue ton-mile? Test using ? = 0.01.

b)(2 points) Test the hypothesis that the operating costs per revenue ton-mile decreases as the ton-mile load factor increases when all other variables are held constant.Use? = 0.01.

\f