Question

The Great Plains Railroad is interested in studying how fuel consumption is related to the number of railcars for its trains on a certain route between Oklahoma City and Omaha.

A random sample of 10 trains on this route has yielded the data in the table below.

a) Is a linear model appropriate for modeling these data? Clearly explain your reasoning.
b) Suppose the fuel consumption cost is $25 per unit. Give a point estimate (single value) for the change in the average cost of fuel per mile for each additional railcar attached to a train. Show your work.
c) Interpret the value of r squared in the context of this problem.
d) Would it be reasonable to use the fitted regression equation to predict the fuel consumption for a train on this route if the train had 65 railcars? Explain.

Answer 1

@jim_thompson5910

Answer 2

@jim_thompson5910

Answer 3

@campbell_st pls help

Answer 4

@pooja195 can u help